Cenko, S. B., Butler, N. R., Ofek, E. O., Perley, D. A., Morgan, A. N., Frail, D. A., ...
We present broadband (gamma-ray, X-ray, near-infrared, optical, and radio) observations of the gamma-ray burst (GRB) 090709A and its afterglow in an effort to ascertain the origin of this high-energy...
A big γ-ray burst at a redshift of z ≈ 8.2 (2009)
Tanvir, N. R., Fox, D. B., Levan, A. J., Berger, E., Wiersema, K., Fynbo, J. P. U., ...
4 pages, 3 figures.-- ArXiv pre-print available at: http://arxiv.org/abs/0906.1577
A γ-ray burst at a redshift of z ≈ 8.2 (2009)
Tanvir, N. R., Fox , D. B., Levan, A. J., Berger, E., Wiersema, K., Fynbo, J. P. U., ...
Long-duration γ-ray bursts (GRBs) are thought to result from the explosions of certain massive stars, and some are bright enough that they should be observable out to redshifts of z > 20 using...
Ofek, E. O., Breslauer, B., Gal-Yam, A., Frail, D., Kasliwal, M. M., Kulkarni, S. R., ...
(abridged) Recently, a new class of radio transients in the 5-GHz band was detected by Bower et al. We present new deep near-Infrared (IR) observations of the field containing these transients, and...
Mysterious transients unmasked as the bright blue death throes of massive stars (2009)
Quimby, R. M., Kulkarni, S. R., Kasliwal, M. M., Gal-Yam, A., Arcavi, I., Sullivan, M., ...
Movies of the heavens, produced by modern synoptic imaging surveys, are revolutionizing the field of cosmic explosions in astronomy. Recent discoveries suggest entirely new pathways for the deaths of...
Hełminiak, K. G., Konacki, M., Kulkarni, S. R., Eisner, J.
Using the adaptive optics facilities at the 200-in Hale and 10-m Keck II, we observed in the near infrared a sample of 12 binary and multiple stars and one open cluster. We used the near diffraction...
A Large-Area Survey for Radio Pulsars at High Galactic Latitudes (2009)
Jacoby, B. A., Bailes, M., Ord, S. M., Edwards, R. T., Kulkarni, S. R.
We have completed a survey for pulsars at high Galactic latitudes with the 64 m Parkes radio telescope. Observing with the 13 beam multibeam receiver at a frequency of 1374 MHz, we covered ~4150...
The Palomar Transient Factory: System Overview, Performance and First Results (2009)
Law, N. M., Kulkarni, S. R., Dekany, R. G., Ofek, E. O., Quimby, R. M., Nugent, P. E., ...
The Palomar Transient Factory (PTF) is a fully-automated, wide-field survey aimed at a systematic exploration of the optical transient sky. The transient survey is performed using a new 8.1 square...
A glimpse of the end of the dark ages: the gamma-ray burst of 23 April 2009 at redshift 8.3 (2009)
Tanvir, N. R., Fox, D. B., Levan, A. J., Berger, E., Wiersema, K., Fynbo, J. P. U., ...
It is thought that the first generations of massive stars in the Universe were an important, and quite possibly dominant, source of the ultra-violet radiation that reionized the hydrogen gas in the...
The Collimation and Energetics of the Brightest Swift Gamma-Ray Bursts (2009)
Cenko, S. B., Frail, D. A., Harrison, F. A., Kulkarni, S. R., Nakar, E., Chandra, P., ...
Long-duration gamma-ray bursts (GRBs) are widely believed to be highly-collimated explosions (opening angle theta ~ 1-10 deg). As a result of this beaming factor, the true energy release from a GRB...
Perley, D. A., Cenko, S. B., Bloom, J. S., Butler, N. R., Kocevski, D., ...
In this work we present the first results of our imaging campaign at Keck Observatory to identify the host galaxies of "dark" gamma-ray bursts (GRBs), events with no detected optical afterglow or...
Dark Bursts in the Swift Era: The Palomar 60 Inch-Swift Early Optical Afterglow Catalog (2009)
Cenko, S. B., Kelemen, J., Harrison, F. A., Fox, D. B., Kulkarni, S. R., Kasliwal, M. M., ...
We present multicolor optical observations of long-duration γ-ray bursts (GRBs) made over a three-year period with the robotic Palomar 60 inch telescope (P60). Our sample consists of all 29 events...
Transients in the Local Universe (2009)
Kulkarni, S. R., Kasliwal, M. M.
Two different reasons make the search for transients in the nearby Universe (d < 200 Mpc) interesting and urgent. First, there exists a large gap in the luminosity of the brightest novae (-10 mag)...
No Planet Left Behind: Investigating Planetary Diversity and Architecture with SIM Lite (2009)
Kulkarni, S. R., Schlichting, H. E., Hansen, B. M. S., Catanzarite, J.
The evidence is mounting that star formation necessarily involves planet formation. We clearly have a vested interest in finding other Earths but a true understanding of planet formation requires...
Precision Astrometry With Adaptive Optics (2009)
Cameron, P. B., Britton, M. C., Kulkarni, S. R.
We investigate the limits of ground-based astrometry with adaptive optics using the core of the Galactic globular cluster M5. Adaptive optics systems provide near diffraction-limit imaging with the...
By making use of the generalized Ruscheweyh derivative, theauthors investigate several interesting properties of certain subclasses of univalent functions having the form f(z) = z - Σn=2..m ((1...
A large-area survey for radio pulsars at high galactic lattitudes (2009)
Jacoby, B. A., Bailes, M., Ord, S. M., Edwards, R. T., Kulkarni, S. R.
We have completed a survey for pulsars at high Galactic latitudes with the 64 m Parkes radio telescope. Observing with the 13 beam multibeam receiver at a frequency of 1374 MHz, we covered ~4150...
A large-area survey for radio pulsars at high galactic lattitudes (2009)
Jacoby, B. A., Bailes, M., Ord, S. M., Edwards, R. T., Kulkarni, S. R.
We have completed a survey for pulsars at high Galactic latitudes with the 64 m Parkes radio telescope. Observing with the 13 beam multibeam receiver at a frequency of 1374 MHz, we covered ~4150...
Sh. Khosravianarab, S. R. Kulkarni, O. P. Ahuja
We investigate several distortion inequalities involving fractional calculus, Ruscheweyh derivatives, and some well-known integral operators. In special cases, the results presented in this paper...
Sh. Khosravianarab, S. R. Kulkarni, O. P. Ahuja
We investigate several distortion inequalities involving fractional calculus, Ruscheweyh derivatives, and some well-known integral operators. In special cases, the results presented in this paper...
New imaging and spectroscopy of the locations of several short-hard gamma-ray bursts (2008)
Gal-Yam, Avishay, Nakar, Ehud, Ofek, Eran O., Cenko, S. B., Kulkarni, S. R., Soderberg, A. M., ...
The detection and characterization of the afterglow emission and host galaxies of short-hard gamma-ray bursts (SHBs) is one of the most exciting recent astronomical discoveries. In particular,...
Dark Bursts in the Swift Era: The Palomar 60 inch-Swift Early Optical Afterglow Catalog (2008)
Cenko, S. B., Kelemen, J., Harrison, F. A., Fox, D. B., Kulkarni, S. R., Kasliwal, M. M., ...
We present multi-color optical observations of long-duration gamma-ray bursts (GRBs) made over a three year period with the robotic Palomar 60 inch telescope (P60). Our sample consists of all 29...
SN 2007ax : an extremely faint type Ia supernova (2008)
Kasliwal, M. M., Ofek, E. O., Gal-Yam, A., Rau, A., Brown, P. J., Cenko, S. B., ...
We present multiband photometric and optical spectroscopic observations of SN 2007ax, the faintest and reddest Type Ia supernova (SN Ia) yet observed. With M_B = − 15.9 and (B − V)_(max) = 1.2,...
A survey for fast transients in the Fornax Cluster of galaxies (2008)
Rau, A., Ofek, E. O., Kulkarni, S. R., Madore, B. F., Pevunova, O., Ajello, M.
The luminosity gap between novae (M_R ≤ − 10) and supernovae (M_R ≥ − 14) has been well known since the pioneering research of Zwicky and Hubble. Nearby galaxy clusters and concentrations...
GRB 070201: A possible soft gamma-ray repeater in M31 (2008)
Ofek, E. O., Muno, M., Quimby, R., Kulkarni, S. R., Stiele, H., Pietsch, W., ...
GRB 070201 was a bright, short-duration, hard-spectrum gamma-ray burst detected by the Interplanetary Network. Its error quadrilateral, which has an area of 0.124 deg^2, intersects some prominent...
SN2007ax : An Extremely Faint Type Ia Supernova (2008)
Kasliwal, M. M., Ofek, E. O., Gal-Yam, A., Rau, A., Brown, P. J., Cenko, S. B., ...
We present multi-band photometric and optical spectroscopic observations of SN2007ax, the faintest and reddest Type Ia supernova (SNIa) yet observed. With M_B = -15.9 and (B-V)max = 1.2, this SN is...
Verbiest, J. P. W., Bailes, M., Van Straten, W., Hobbs, G. B., Edwards, R. T., Manchester, R. N., ...
Analysis of 10 years of high-precision timing data on the millisecond pulsar PSR J0437–4715 has resulted in a model-independent kinematic distance based on an apparent orbital period derivative,...
Precision Astrometry with Adaptive Optics (2008)
Cameron, P. B., Britton, M. C., Kulkarni, S. R.
We investigate the limits of ground-based astrometry with adaptive optics using the core of the Galactic globular cluster M5. Adaptive optics systems provide near diffraction-limit imaging with the...
GRB 070610: a curious galactic transient (2008)
Kasliwal, M. M., Cenko, S. B., Kulkarni, S. R., Cameron, P. B., Nakar, E., Ofek, E. O., ...
GRB 070610 is a typical high-energy event with a duration of 5 s. Yet within the burst localization we detect a highly unusual X-ray and optical transient, Swift J195509.6+261406. We see...
A Survey for Fast Transients in the Fornax Cluster of Galaxies (2008)
Rau, A., Ofek, E. O., Kulkarni, S. R., Madore, B. F., Pevunova, O., Ajello, M.
The luminosity gap between novae (M_R < -10) and supernovae (M_R > -14) is well known since the pioneering research of Zwicky and Hubble. Nearby galaxy clusters and concentrations offer an excellent...
Muterspaugh, Matthew W., Lane, Benjamin F., Fekel, Francis C., Konacki, Maciej, Burke, Bernard F., Kulkarni, S. R., ...
μ Orionis was identified by spectroscopic studies as a quadruple-star system. Seventeen high-precision differential astrometry measurements of μ Ori have been collected by the Palomar...
An extremely luminous X-ray outburst at the birth of a supernova (2008)
Soderberg, A. M., Berger, E., Page, K. L., Schady, P., Parrent, J., Pooley, D., ...
Massive stars end their short lives in spectacular explosions, supernovae, that synthesize new elements and drive galaxy evolution. Throughout history supernovae were discovered chiefly through their...
The environment of M85 optical transient 2006-1 : constraints on the progenitor age and mass (2008)
Ofek, E. O., Kulkarni, S. R., Rau, A., Cenko, S. B., Peng, E. W., Blakeslee, J. P., ...
M85 Optical Transient 2006-1 (M85 OT 2006-1) is the most luminous member of the small family of V838 Mon-like objects, whose nature is still a mystery. This event took place in the Virgo Cluster of...
Verbiest, J. P. W., Bailes, M., Van Straten, W., Hobbs, G. B., Edwards, R. T., Manchester, R. N., ...
Analysis of ten years of high-precision timing data on the millisecond pulsar PSR J0437-4715 has resulted in a model-independent kinematic distance based on an apparent orbital period derivative,...
An extremely luminous X-ray outburst at the birth of a supernova (2008)
Soderberg, A. M., Berger, E., Page, K. L., Schady, P., Parrent, J., Pooley, D., ...
GRB 070610: a curious galactic transient (2008)
Kasliwal, M. M., Cenko, S. B., Kulkarni, S. R., Cameron, P. B., Nakar, E., Ofek, E. O., ...
GRB 070201: a possible soft gamma-ray repeater in M31 (2008)
Ofek, E. O., Muno, M., Quimby, R., Kulkarni, S. R., Stiele, H., Pietsch, W., ...
A survey for fast transients in the Fornax cluster of galaxies (2008)
Rau, A., Ofek, E. O., Kulkarni, S. R., Madore, B. F., Pevunova, O., Ajello, M.
A large-area survey for radio pulsars at high galactic latitudes (2008)
Jacoby, B. A., Bailes, M., Ord, S., Knight, H., Hotan, A., Edwards, R. T., ...
We have completed a survey for pulsars at high galactic latitudes with the 64-m Parkes radio telescope. Observing with the 13-beam multibeam receiver at a frequency of 1374 MHz, we covered ~4150...
An extremely luminous X-ray outburst at the birth of a supernova (2008)
Soderberg, A.M., Berger, E., Page, K.L., Schady, P., Parrent, J., Pooley, D., ...
Massive stars end their short lives in spectacular explosions—supernovae—that synthesize new elements and drive galaxy evolution. Historically, supernovae were discovered mainly through their...
A large-area survey for radio pulsars at high galactic latitudes (2008)
Jacoby, B. A., Bailes, M., Ord, S., Knight, H., Hotan, A., Edwards, R. T., ...
We have completed a survey for pulsars at high galactic latitudes with the 64-m Parkes radio telescope. Observing with the 13-beam multibeam receiver at a frequency of 1374 MHz, we covered ~4150...
GRB 070201: A possible Soft Gamma Ray Repeater in M31 (2007)
Ofek, E. O., Muno, M., Quimby, R., Kulkarni, S. R., Stiele, H., Pietsch, W., ...
The gamma-ray burst (GRB) 070201 was a bright short-duration hard-spectrum GRB detected by the Inter-Planetary Network (IPN). Its error quadrilateral, which has an area of 0.124 sq. deg, intersects...
GRB070125: The First Long-Duration Gamma-Ray Burst in a Halo Environment (2007)
Cenko, S. B., Fox, D. B., Penprase, B. E., Cucchiara, A., Price, P. A., Berger, E., ...
We present the discovery and high signal-to-noise spectroscopic observations of the optical afterglow of the long-duration gamma-ray burst GRB070125. Unlike all previously observed long-duration...
DISCOVERY OFTWO RADIO PULSARS IN THE GLOBULAR CLUSTER M15 (2007)
S. B. Anderson, P. W. Gorham, S. R. Kulkarni, T. A. Prince, A. Wolszczan
We report the discovery of two radio pulsars, 2127+11B and 2127+11C, in the globular cluster M15 (NGC 7078), which also contains the 110-ms pulsar 2127+11A (Wolszczan et al. 1989). Although only...
Faint X-ray sources in the core of the globular cluster M28 (2007)
Danner Kulkarni Saito, R. Danner, S. R. Kulkarni, Y. Saito, N. Kawai
the potential to distinguish between the two models. The globular cluster M28 was observed with the High Resolution Imager 1 (HRI) aboard the X-ray satellite ROSAT [3] between March 18, 1995 and...
Pulsars In Globular Clusters (2007)
S. R. Kulkarni, Kulkarni And Anderson
this article we argue that the massive stars could have played a significant and perhaps even a crucial role in the survivability of proto-globular clusters. Their remnants, the neutron stars, are...
Much Ado About Nothing: Several Large-Area Surveys for Radio Pulsars from Arecibo (2007)
Paul S. Ray, S. R. Kulkarni, Thomas A. Prince, S. E. Thorsett, Gautam Vasisht, ...
We report surveyed regions and flux limits for several large-area surveys at 430 MHz for radio pulsars using the 305-m reflector at Arecibo, Puerto Rico. The surveys used integration times between 8...
The unusual afterglow of GRB 980326: evidence for the gamma-ray burst/supernova connection (2007)
Bloom Kulkarni, J. S. Bloom, S. R. Kulkarni, S. G. Djorgovski, A. C. Eichelberger, J. P. Blakeslee, ...
this paper in your own paper. However, we do place restrictions on any dissemination in the popular media. The article is under embargo until it is published. For further enquiries, please contact...
Observations of two Millisecond Pulsars in the Globular Cluster NGC5904 (2007)
Anderson And Wolszczan, S. B. Anderson, A. Wolszczan, S. R. Kulkarni, T. A. Prince
We report on 5 years of pulsar observations of the globular cluster NGC5904 (M5). A timing model has been obtained for the two known pulsars, and a deep search for additional faint isolated pulsars...
A Survey for Millisecond Pulsars (2007)
P. S. Ray, S. E. Thorsett, F. A. Jenet, S. R. Kulkarni, T. A. Prince, ...
We have searched 960 square degrees of sky for radio pulsars, using the 305 m telescope at Arecibo, Puerto Rico. The 430 MHz survey reached a limiting sensitivity for slow pulsars of 0.7 mJy using a...
Ju Ne, K. Matthews, T. Nakajima, S. R. Kulkarni
Infrared broad-band photometry of the cool brown dwarf Gliese 229B extending in wavelength from 0.8 to 10.5 ¯m is reported. These results are derived from both new data and reanalyzed, previously...
B. F. Lane, R. R. Thompson, C. D. Koresko, S. R. Kulkarni, ...
Interferometrically determined angular diameters obtained at the Palomar Testbed Interferometer (PTI) for 69 giant and supergiant stars are presented. Spectral types of the 59 giant stars generally...
F. Malbet, M. M. Colavita, M. Shao, J. K. Wallace, A. F. Boden, ...
We present the first infrared interferometric observations of a young stellar object with a spatial projected resolution better than 2 AU. The observations were obtained with the Palomar Testbed...
OLD PULSARS IN THE LOW-DENSITY GLOBULAR CLUSTERS M13 AND M53 (2007)
S. R. Kulkarni, S. B. Anderson, T. A. Prince, A. Wolszczan
Millisecond pulsars are conventionally assumed to be spun up through the action of binary companions, although some subsequently lose their companions and appear as isolated pulsars. Such objects...
A. F. Boden, C. D. Koresko, M. M. Colavita, P. J. Dumont, J. Gubler, ...
We have determined the visual orbit for the spectroscopic binary • Pegasi with interferometric visibility data obtained by the Palomar Testbed Interferometer in 1997. • Peg is a double-lined...
OLD PULSARS IN THE LOW-DENSITY GLOBULAR CLUSTERS M13 AND M53 (2007)
S. R. Kulkarni, S. B. Anderson, T. A. Prince, A. Wolszczan
Millisecond pulsars are conventionally assumed to be spun up through the action of binary companions, although some subsequently lose their companions and appear as isolated pulsars. Such objects...
Paul S. Ray, S. R. Kulkarni, Thomas A. Prince, S. E. Thorsett, Gautam Vasisht, ...
We report surveyed regions and flux limits for several large-area surveys at 430 MHz for radio pulsars using the 305-m reflector at Arecibo, Puerto Rico. The surveys used integration times between 8...
Observations of two Millisecond Pulsars in the Globular Cluster (2007)
S. B. Anderson, A. Wolszczan, S. R. Kulkarni, T. A. Prince
We report on 5 years of pulsar observations of the globular cluster NGC5904 (M5). A timing model has been obtained for the two known pulsars, and a deep search for additional faint isolated pulsars...
The Astrophysical Journal, J. S. Bloom, S. R. Kulkarni, F. Harrison, T. Prince, E. S. Phinney, ...
The spatial and temporal coincidence of gamma-ray burst (GRB) 980425 and supernova (SN) 1998bw has prompted speculation that there exists a subclass of GRBs produced by SNe ("S-GRBs"). A...
The Environment of M85 optical transient 2006-1: constraints on the progenitor age and mass (2007)
Ofek, E. O., Kulkarni, S. R., Rau, A., Cenko, S. B., Peng, E. W., Blakeslee, J. P., ...
M85 optical transient 2006-1 (M85 OT 2006-1) is the most luminous member of the small family of V838 Mon-like objects, whose nature is still a mystery. This event took place in the Virgo cluster of...
Muterspaugh, Matthew W., Lane, Benjamin F., Fekel, Francis C., Konacki, Maciej, Burke, Bernard F., Kulkarni, S. R., ...
mu Orionis was identified by spectroscopic studies as a quadruple star system. Seventeen high precision differential astrometry measurements of mu Ori have been collected by the Palomar...
Lane, Benjamin F., Muterspaugh, Matthew W., Fekel, Francis C., Williamson, Michael, Browne, Stanley, Konacki, Maciej, ...
We have used high precision differential astrometry from the Palomar High-precision Astrometric Search for Exoplanet Systems (PHASES) project and radial velocity measurements covering a time-span of...
Near-Infrared and X-Ray Observations of the Enigmatic G70.7+1.2 (2007)
Cameron, P. B., Kulkarni, S. R.
We present high-resolution imaging of the puzzling radio and optical nebula G70.7+1.2 with the Keck Observatory's laser guide star adaptive optics (LGS-AO) system and the Chandra X-Ray Observatory....
Berger, E., Chary, R., Cowie, L. L., Price, P. A., Schmidt, B. P., Fox, D. B., ...
We present deep Hubble Space Telescope (HST ) and Spitzer Space Telescope observations of GRB 050904 at z = 6:295. We detect the afterglow in the H band more than 3 weeks after the burst and confirm...
GRB070610 : A Curious Galactic Transient (2007)
Kasliwal, M. M., Cenko, S. B., Kulkarni, S. R., Cameron, P. B., Nakar, E., Ofek, E. O., ...
GRB 070610 is a typical high-energy event with a duration of 5s.Yet within the burst localization we detect a highly unusual X-ray and optical transient, SwiftJ195509.6+261406. We see high amplitude...
A New Population of High-Redshift Short-Duration Gamma-Ray Bursts (2007)
Berger, E., Fox, D. B., Price, P. A., Nakar, E., Gal-Yam, A., Holz, D. E., ...
The redshift distribution of the short-duration gamma-ray bursts (GRBs) is a crucial, but currently fragmentary, clue to the nature of their progenitors. Here we present optical observations of nine...
Properties of a Gamma-Ray Burst Host Galaxy at z ~ 5 (2007)
Price, P. A., Songaila, A., Cowie, L. L., Bell Burnell, J., Berger, E., Cucchiara, A., ...
We describe the properties of the host galaxy of the gamma-ray burst GRB 060510B based on a spectrum of the burst afterglow obtained with the Gemini North 8 m telescope. The galaxy lies at a redshift...
Properties of a Gamma Ray Burst Host Galaxy at z ~ 5 (2007)
Price, P. A., Songaila, A., Cowie, L. L., Burnell, J. Bell, Berger, E., Cucchiara, A., ...
We describe the properties of the host galaxy of the gamma-ray burst GRB060510B based on a spectrum of the burst afterglow obtained with the Gemini North 8m telescope. The galaxy lies at a redshift...
An unusually brilliant transient in the galaxy Messier 85 (2007)
Kulkarni, S. R., Ofek, E. O., Rau, A., Cenko, S. B., Soderberg, A. M., Fox, D. B., ...
Historically, variable and transient sources have both surprised astronomers and provided new views of the heavens. Here we report the discovery of an optical transient in the outskirts of the...
The ERO Host Galaxy of GRB 020127: Implications for the Metallicity of GRB Progenitors (2007)
Berger, E., Fox, D. B., Kulkarni, S. R., Frail, D. A., Djorgovski, S. G.
We present optical and near-IR observations of the host galaxy of GRB 020127, for which we measure R - K_s = 6.2 mag. This is only the second GRB host to date classified as an ERO. The spectral...
Variability of 19 Millisecond Pulsars in 47 Tucanae with Chandra HRC-S (2007)
Cameron, P. B., Rutledge, R. E., Camilo, F., Bildsten, L., Ransom, S. M., Kulkarni, S. R.
We present results from our 830 ks observation of the globular cluster 47 Tucanae with the Chandra X-ray Observatory's High Resolution Camera-S. We limit our analysis here to the 19 previously known,...
Near-Infrared and X-ray Observations of the Enigmatic G70.7+1.2 (2007)
Cameron, P. B., Kulkarni, S. R.
We present high resolution imaging of the puzzling radio and optical nebula G70.7+1.2 with the Keck Observatory's laser guide star adaptive optics (LGS-AO) system and the Chandra X-ray Observatory....
Ofek, E. O., Cenko, S. B., Gal-Yam, A., Fox, D. B., Nakar, E., Rau, A., ...
On 2006 May 5, a four second duration, low energy, ~10^49 erg, Gamma-Ray Burst (GRB) was observed, spatially associated with a z=0.0894 galaxy. Here, we report the discovery of the GRB optical...
Variability of Nineteen Millisecond Pulsars in 47 Tucanae with CHANDRA/HRC-S (2007)
Cameron, P. B., Rutledge, R. E., Camilo, F., Bildsten, L., Ransom, S. M., Kulkarni, S. R.
We present results from our 830 ksec observation of the globular cluster 47 Tucanae with the Chandra X-ray Observatory's High Resolution Camera-S. We limit our analysis here to the 19 previously...
Some Discrete Approximations to a Variational Method for Image Segmentation (2007)
Kulkarni, S. R., Mitter, S. K.
Variational formulations have been proposed for a number of tasks in early vision. Discrete versions of these problems are closely related to Markov random field models and are typically used in...
Active Learning Using Arbitrary Binary Valued Queries (2007)
KulKarni, S. R., Mitter, S. K., Tsitsiklis, J. N.
The original and most widely studied PAC model for learning assumes a passive learner in the sense that the learner plays no role in obtaining information about the unknown concept. That is, the...
PAC Learning with Generalized Samples and an Application to Stochastic Geometry (2007)
Kulkarni, S. R., Mitter, S. K., Tsitsiklis, J. N., Zeitouni, O.
In this paper, we introduce an extension of the standard PAC model which allows the use of generalized samples. We view a generalized sample as a pair consisting of a functional on the concept class...
Kulkarni, S.R., Fall, C.H., Joshi, N.V., Lubree, H.G., Deshpande, V.U., Pasarkar, R.V., ...
OBJECTIVE: To study determinants of incident hyperglycemia in rural Indian mothers 6 years after delivery. RESEARCH DESIGN AND METHODS: The Pune Maternal Nutrition Study collected information in six...
Limits to tertiary astrometric companions in binary systems (2006)
Muterspaugh, Matthew W., Lane, Benjamin F., Kulkarni, S. R., Burke, Bernard F., Colavita, M.M., Shao, M.
The Palomar High-precision Astrometric Search for Exoplanet Systems (PHASES) has monitored 37 subarcsecond binary systems to determine whether their Keplerian orbits are perturbed by faint...
SN 2006gy: An extremely luminous supernova in the galaxy NGC 1260 (2006)
Ofek, E. O., Cameron, P. B., Kasliwal, M. M., Gal-Yam, A., Rau, A., Kulkarni, S. R., ...
With an extinction-corrected V-band peak absolute magnitude of about -22, supernova (SN) 2006gy is probably the brightest SN ever observed. We report on multi-wavelength observations of this SN and...
Spitzer Observations of the New Luminous Red Nova M85OT2006-1 (2006)
Rau, A., Kulkarni, S. R., Ofek, E. O., Yan, L.
M85OT2006-1 is the latest and most brilliant addition to the small group of known Luminous Red Novae (LRNe). An identifying characteristic of the previously detected events (M31 RV, V4322 Sgr & V838...
The Incidence of Dwarf Novae in Large Area Transient Searches (2006)
Rau, A., Schwarz, R., Kulkarni, S. R., Ofek, E. O., Kasliwal, M. M., Brinkworth, C., ...
Understanding and quantifying the contribution of known classes of transient and variable sources is an important lesson to be learned from the manifold of pre-cursors programs of the near-future...
The Short-Hard GRB 051103: Observations and Implications for Its Nature (2006)
Ofek, E. O., Kulkarni, S. R., Nakar, E., Cenko, S. B., Cameron, P. B., Frail, D. A., ...
The bright short-hard GRB 051103 was triangulated by the Inter-Planetary Network and found to occur in the direction of the nearby M81/M82 galaxy group. Given its possible local-universe nature, we...
Cenko, S. B., Kasliwal, M., Harrison, F. A., Pal'shin, V., Frail, D. A., Cameron, P. B., ...
We present observations of the unusually bright and long γ-ray burst GRB 050820A, one of the best sampled broadband data sets in the Swift era. The γ-ray light curve is marked by a soft precursor...
A New Population of High Redshift Short-Duration Gamma-Ray Bursts (2006)
Berger, E., Fox, D. B., Price, P. A., Nakar, E., Gal-Yam, A., Holz, D. E., ...
The redshift distribution of the short-duration GRBs is a crucial, but currently fragmentary, clue to the nature of their progenitors. Here we present optical observations of nine short GRBs obtained...
The short-hard GRB 051103: Observations and implications for its nature (2006)
Ofek, E. O., Kulkarni, S. R., Nakar, E., Cenko, S. B., Cameron, P. B., Frail, D. A., ...
The bright short-hard GRB 051103 was triangulated by the inter-planetary network and found to occur in the direction of the nearby M81/M82 galaxy group. Given its possible local-Universe nature, we...
The ERO Host Galaxy of GRB 020127: Implications for the Metallicity of GRB Progenitors (2006)
Berger, E., Fox, D. B., Kulkarni, S. R., Frail, D. A., Djorgovski, S. G.
We present optical and near-IR observations of the host galaxy of GRB 020127, for which we measure R-K=6.2 mag. This is only the second GRB host to date, which is classified as an ERO. The spectral...
Limits to Tertiary Astrometric Companions in Binary Systems (2006)
Muterspaugh, Matthew W., Lane, Benjamin F., Kulkarni, S. R., Burke, B. F., Colavita, M. M., Shao, M.
The Palomar High-precision Astrometric Search for Exoplanet Systems (PHASES) has monitored 37 sub-arcsecond binary systems to determine whether their Keplerian orbits are perturbed by faint...
The Automated Palomar 60-Inch Telescope (2006)
Cenko, S. Bradley, Fox, Derek B., Moon, Dae-Sik, Harrison, Fiona A., Kulkarni, S. R., Henning, John R., ...
We have converted the Palomar 60-inch telescope (P60) from a classical night assistant-operated telescope to a fully robotic facility. The automated system, which has been operational since September...
Cenko, S. B., Kasliwal, M., Harrison, F. A., Pal'shin, V., Frail, D. A., Cameron, P. B., ...
We present observations of the unusually bright and long gamma-ray burst GRB 050820A, one of the best-sampled broadband data sets in the Swift era. The gamma-ray light curve is marked by a soft...
An Energetic Afterglow from a Distant Stellar Explosion (2006)
Frail, D. A., Cameron, P. B., Kasliwal, M., Nakar, E., Price, P. A., Berger, E., ...
We present the discovery of radio afterglow emission from the high-redshift (z = 6.295) burst GRB 050904. The peak flux density for this burst is similar to typical low-redshift gamma-ray bursts...
Soderberg, A. M., Nakar, E., Cenko, S. B., Cameron, P. B., Frail, D. A., Kulkarni, S. R., ...
We present detailed optical, near-infrared, and radio observations of the X-ray flash 050416a obtained with Palomar and Siding Springs Observatories as well as HST and the VLA, placing this event...
Scientific Results from High-precision Astrometry at the Palomar Testbed Interferometer (2006)
Muterspaugh, Matthew W., Lane, Benjamin F., Konacki, Maciej, Burke, B. F., Colavita, M. M., Kulkarni, S. R., ...
A new observing mode for the Palomar Testbed Interferometer was developed in2002-2003 which enables differential astrometry at the level of 20 micro-arcseconds for binary systems with separations of...
Measurement of Orbital Decay in the Double Neutron Star Binary PSR B2127+11C (2006)
Jacoby, B. A., Cameron, P. B., Jenet, F. A., Anderson, S. B., Murty, R. N., Kulkarni, S. R.
We report the direct measurement of orbital period decay in the double neutron star pulsar system PSR B2127+11C in the globular cluster M15 at the rate of $(-3.95 \pm 0.13) \times 10^{-12}$,...
An Energetic Afterglow From A Distant Stellar Explosion (2006)
Frail, D. A., Cameron, P. B., Kasliwal, M., Nakar, E., Price, P. A., Berger, E., ...
We present the discovery of radio afterglow emission from the high redshift (z=6.295) burst GRB 050904. The peak flux density for this burst is similar to typical low-redshift gamma-ray bursts (GRB)....
Relativistic ejecta from XRF 060218 and the rate of cosmic explosions (2006)
Soderberg, A. M., Kulkarni, S. R., Nakar, E., Berger, E., Fox, D. B., Frail, D. A., ...
Over the last decade, long-duration gamma-ray bursts (GRBs) including the subclass of X-ray flashes (XRFs) have been revealed to be a rare variety of Type Ibc supernova (SN). While all these events...
The nature of the DLS fast transients (2006)
The discovery and study of highly transient sources, especially those which rise to high brightness and then fade to obscurity, has been a major part of modern astrophysics. Well known examples...
Evidence of Orbital Motion in the Binary Brown Dwarf Kelu‐1AB (2006)
Gelino, Christopher R., Kulkarni, S. R., Stephens, Denise C.
We have resolved Kelu‐1 into a binary system with a separation of 290 mas using the Laser Guide Star Adaptive Optics system on the Keck II telescope. We have also reanalyzed a 1998 HST observation...
Berger, E., Chary, R., Cowie, L. L., Price, P. A., Schmidt, B. P., Fox, D. B., ...
We present deep Hubble Space Telescope and Spitzer Space Telescope observations of the host galaxy of GRB 050904 at z=6.295. The host is detected in the H-band and marginally at 3.6 micron. From...
Optical Detection of Two Intermediate Mass Binary Pulsar Companions (2006)
Jacoby, B. A., Chakrabarty, D., Van Kerkwijk, M. H., Kulkarni, S. R., Kaplan, D. L.
We report the detection of probable optical counterparts for two Intermediate Mass Binary Pulsar (IMBP) systems, PSR J1528-3146 and PSR J1757-5322. Recent radio pulsar surveys have uncovered a...
An X-ray Search for Compact Central Sources in Supernova Remnants II: Six Large Diameter SNRs (2006)
Kaplan, D. L., Gaensler, B. M., Kulkarni, S. R., Slane, P. O.
We present the second in a series of results in which we have searched for undiscovered neutron stars in supernova remnants (SNRs). This paper deals with the largest six SNRs in our sample, too large...
The Afterglow, Energetics and Host Galaxy of the Short-Hard Gamma-Ray Burst 051221a (2006)
Soderberg, A. M., Berger, E., Kasliwal, M., Frail, D. A., Price, P. A., Schmidt, B. P., ...
We present detailed optical, X-ray and radio observations of the bright afterglow of the short gamma-ray burst 051221a obtained with Gemini, Swift/XRT, and the Very Large Array, as well as optical...
The ultra-cool white dwarf companion of PSR J0751+1807 (2006)
Bassa, C. G., Van Kerkwijk, M. H., Kulkarni, S. R.
We present optical and near-infrared observations with Keck of the binary millisecond pulsar PSR J0751+1807. We detect a faint, red object - with R=25.08+-0.07, B-R=2.5+-0.3, and R-I=0.90+-0.10 - at...
A photometric redshift of z = 6.39 ¿ 0.12 for GRB 050904 (2006)
Haislip, J.B., Nysewander, M.C., Reichart, D.E., Levan, A.J., Tanvir, N., Cenko, S.B., ...
Gamma-ray bursts (GRBs) and their afterglows are the most brilliant transient events in the Universe. Both the bursts themselves and their afterglows have been predicted to be visible out to...
Subordination properties of P-valent functions defined by integral operators (2006)
Saeid Shams, S. R. Kulkarni, Jay M. Jahangiri
By applying certain integral operators to P-valent functions we define a comprehensive family of analytic functins. The subordinations properties of this family is studied, which in certain special...
Scalable algorithms for aggregating disparate forecasts of probability (2006)
J. B. Predd, S. R. Kulkarni, H. V. Poor
Abstract- In this paper, computational aspects of the panel aggregation problem are addressed. Motivated primarily by applications of risk assessment, an algorithm is developed for aggregating large...
Subordination properties of P-valent functions defined by integral operators (2006)
Saeid Shams, S. R. Kulkarni, Jay M. Jahangiri
By applying certain integral operators to P-valent functions we define a comprehensive family of analytic functins. The subordinations properties of this family is studied, which in certain special...
Soderberg, A. M., Chevalier, R. A., Kulkarni, S. R., Frail, D. A.
We report extensive radio and X-ray observations of SN 2003bg whose spectroscopic evolution shows a transition from a broad-lined Type Ic to a hydrogen-rich Type II and later to a typical...
Penprase, B. E., Berger, E., Fox, D. B., Kulkarni, S. R., Kadish, S., Kerber, L., ...
We present a high-resolution, high signal-to-noise optical spectrum of the afterglow of GRB 051111 obtained with the HIRES spectrograph on the Keck I 10-m telescope. The spectrum exhibits three...
Berger, E., Penprase, B. E., Fox, D. B., Kulkarni, S. R., Hill, G., Schaefer, B., ...
We present an analysis of fine-structure transitions of FeII and SiII detected in a high-resolution optical spectrum of the afterglow of GRB 051111 (z=1.54948). The fine-structure absorption features...
Berger, E., Penprase, B. E., Cenko, S. B., Kulkarni, S. R., Fox, D. B., Steidel, C. C., ...
We present the discovery of the optical afterglow of GRB 050505 and an optical absorption spectrum obtained with the Keck I 10-m telescope. The spectrum exhibits three redshifted absorption systems...
Modeling Supernova-like Explosions Associated with Gamma-ray Bursts with Short Durations (2005)
There is now good evidence linking short-hard GRBs with both elliptical and spiral galaxies at relatively low redshifts, redshift of about 0.2. This contrasts with the average redshift of about 2 of...
The afterglow of GRB050709 and the nature of the short-hard gamma-ray bursts (2005)
Fox, D. B., Frail, D. A., Price, P. A., Kulkarni, S. R., Berger, E., Piran, T., ...
The final chapter in the long-standing mystery of the gamma-ray bursts (GRBs) centres on the origin of the short-hard class, suspected on theoretical grounds to result from the coalescence of neutron...
The Progenitors of Short-Hard Gamma-Ray Bursts from an Extended Sample of Events (2005)
Gal-Yam, Avishay, Nakar, Ehud, Ofek, Eran, Fox, D. B., Cenko, S. B., Kulkarni, S. R., ...
The detection of the afterglow emission and host galaxies of short-hard gamma-ray bursts (SHBs) is one of the most exciting recent astronomical discoveries. Indications that SHB progenitors belong to...
Muterspaugh, Matthew W., Lane, Benjamin F., Konacki, Maciej, Burke, Bernard F., Colavita, M. M., Kulkarni, S. R., ...
V819 Herculis is a well-studied triple star system consisting of a ``wide'' pair with 5.5 year period, one component of which is a 2.2-day period eclipsing single-line spectroscopic binary....
Muterspaugh, Matthew W., Lane, Benjamin F., Konacki, Maciej, Wiktorowicz, Sloane, Burke, Bernard F., Colavita, M. M., ...
kappa Pegasi is a well-known, nearby triple star system. It consists of a ``wide'' pair with semi-major axis 235 milli-arcseconds, one component of which is a single-line spectroscopic binary...
Density Evolution for Asymmetric Memoryless Channels (2005)
Density evolution is one of the most powerful analytical tools for low-density parity-check (LDPC) codes and graph codes with message passing decoding algorithms. With channel symmetry as one of its...
Evidence of Orbital Motion in the Binary Brown Dwarf Kelu-1AB (2005)
Gelino, Christopher R., Kulkarni, S. R., Stephens, D. C.
We have resolved Kelu-1 into a binary system with a separation of ~290 mas using the Laser Guide Star Adaptive Optics system on the Keck II telescope. We have also re-analyzed a 1998 HST observation...
The afterglow and elliptical host galaxy of the short gamma-ray burst GRB 050724 (2005)
Berger, E., Price, P. A., Cenko, S. B., Gal-Yam, A., Soderberg, A. M., Kasliwal, M., ...
Despite a rich phenomenology, gamma-ray bursts (GRBs) are divided into two classes based on their duration and spectral hardness -- the long-soft and the short-hard bursts. The discovery of afterglow...
PHASES High Precision Differential Astrometry of delta Equulei (2005)
Muterspaugh, Matthew W., Lane, Benjamin F., Konacki, Maciej, Burke, Bernard F., Colavita, M. M., Kulkarni, S. R., ...
delta Equulei is among the most well-studied nearby binary star systems. Results of its observation have been applied to a wide range of fundamental studies of binary systems and stellar...
The Mass of a Millisecond Pulsar (2005)
Jacoby, B. A., Hotan, A., Bailes, M., Ord, S., Kulkarni, S. R.
We report on nearly two years of timing observations of the low-mass binary millisecond pulsar, PSR J1909-3744 with the Caltech-Parkes-Swinburne Recorder II (CPSR2), a new instrument that gives...
Soderberg, A. M., Nakar, E., Kulkarni, S. R., Berger, E.
We present late-time radio observations of 68 local Type Ibc supernovae, including six events with broad optical absorption lines (``hypernovae''). None of these objects exhibit radio emission...
A high angular-resolution search for the progenitor of the type Ic Supernova 2004gt (2005)
Gal-Yam, A., Fox, D. B., Kulkarni, S. R., Matthews, K., Leonard, D. C., Sand, D. J., ...
We report the results of a high-spatial-resoltion search for the progenitor of type Ic supernova SN 2004gt, using the newly commissioned Keck laser-guide star adaptive optics system (LGSAO) along...
The Afterglows, Redshifts, and Properties of Swift Gamma-Ray Bursts (2005)
Berger, E., Kulkarni, S. R., Fox, D. B., Soderberg, A. M., Harrison, F. A., Nakar, E., ...
We present optical, near-IR, and radio follow up of sixteen Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, supplemented by data...
The Radio Afterglow and Host Galaxy of the Dark GRB 020819 (2005)
Jakobsson, P., Frail, D. A., Fox, D. B., Price, P. A., Kulkarni, S. R., ...
Of the fourteen gamma-ray bursts (GRBs) localized to better than 2' radius with the SXC on HETE-2, only two lack optical afterglow detections, and the high recovery rate among this sample has been...
An HST Study of the Supernovae Accompanying GRB 040924 and GRB 041006 (2005)
Soderberg, A. M., Kulkarni, S. R., Price, P. A., Fox, D. B., Berger, E., ...
We present the results from a {\it Hubble Space Telescope/ACS} study of the supernovae associated with gamma-ray bursts 040924 ($z=0.86$) and 041006 ($z=0.71$). We find evidence that both GRBs were...
An HST Search for Supernovae Accompanying X-ray Flashes (2005)
Soderberg, A. M., Kulkarni, S. R., Fox, D. B., Berger, E., Price, P. A., Cenko, S. B., ...
We present the results from an Hubble Space Telescope/ACS search for supernovae associated with X-ray flashes 020903, 040701, 040812 and 040916. We find strong evidence that XRF 020903 (z=0.25) was...
The Discovery of the Optical and Near-IR Afterglows of the First Swift Gamma-Ray Bursts (2005)
Berger, E., Fox, D. B., Kulkarni, S. R., Krzeminski, W., Soderberg, A. M., Frail, D. A., ...
We present optical and near-infrared searches for afterglow emission from the first four Swift bursts with accurate positions from the X-ray Telescope (XRT). Using telescopes at Las Campanas, Keck,...
Discovery of a Radio Source following the 27 December 2004 Giant Flare from SGR 1806-20 (2005)
Cameron, P. B., Chandra, P., Ray, A., Kulkarni, S. R., Frail, D. A., Wieringa, M. H., ...
Over a decade ago it was established that the remarkable high energy transients, known as soft gamma-ray repeaters (SGRs), are a Galactic population and originate from neutron stars with intense (~...
Increasing maternal parity predicts neonatal adiposity: Pune Maternal Nutrition Study (2005)
Joshi, N.P., Kulkarni, S.R., Yajnik, C.S., Joglekar, C.V., Rao, S., Coyaji, K.J., ...
Objective This study was undertaken to study the effect of parity on maternal and neonatal characteristics. Study design Maternal anthropometry, diet, micronutrient status, biochemistry, and physical...
Erratum: The Swift Gamma-Ray Burst Mission (2005)
Gehrels, N., Chincarini, G., Giommi, P., Mason, K. O., Nousek, J. A., Wells, A. A., ...
Detection of a radio counterpart to the 27 December 2004 giant flare from SGR 1806-20 (2005)
Cameron, P. B., Chandra, P., Ray, A., Kulkarni, S. R., Frail, D. A., Wieringa, M. H., ...
The mass of a millisecond pulsar (2005)
Jacoby, Brian A., Hotan, Aidan W., Bailes, Matthew, Ord, Stephen M., Kulkarni, S.R.
No abstract available.
The mass of a millisecond pulsar (2005)
Jacoby, Bryan A., Hotan, Aidan W., Bailes, Matthew, Ord, Stephen M., Kulkarni, S.R.
No abstract available.
The mass of a millisecond pulsar (2005)
Jacoby, Brian A., Hotan, Aidan W., Bailes, Matthew, Ord, Stephen M., Kulkarni, S.R.
No abstract available.
Afterglows, redshifts, and properties of swift gammaray bursts (2005)
Berger, E., Kulkarni, S. R., Fox, D. B., Soderberg, A. M.., Harrison, F. A., Nakar, E., ...
We present optical, near-IR, and radio follow-up of 16 Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, supplemented by data from...
The mass of a millisecond pulsar (2005)
Jacoby, Brian A., Hotan, Aidan W., Bailes, Matthew, Ord, Stephen M., Kulkarni, S.R.
No abstract available.
Afterglows, redshifts, and properties of swift gammaray bursts (2005)
Berger, E., Kulkarni, S. R., Fox, D. B., Soderberg, A. M.., Harrison, F. A., Nakar, E., ...
We present optical, near-IR, and radio follow-up of 16 Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, supplemented by data from...
Afterglows, Redshifts, and Properties of Swift Gamma-Ray Bursts (2005)
Berger, E., Kulkarni, S. R., Fox, D. B., Soderberg, A. M., Harrison, F. A., Nakar, E., ...
We present optical, near-IR, and radio follow-up of 16 Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, supplemented by data from...
The mass of a millisecond pulsar (2005)
Jacoby, Bryan A., Hotan, A. W., Bailes, M., Ord, S. M., Kulkarni, S. R.
Abstract not available.
The mass of a millisecond pulsar (2005)
Jacoby, Bryan A., Hotan, Aidan W., Bailes, Matthew, Ord, Stephen M., Kulkarni, S. R.
Abstract not available.
The mass of a millisecond pulsar (2005)
Jacoby, Bryan A., Hotan, A. W., Bailes, M., Ord, S. M., Kulkarni, S. R.
Abstract not available.
Rajala, Anne M., Fox, Derek B., Gal-Yam, Avishay, Leonard, Douglas C., Soderberg, Alicia M., Kulkarni, S. R., ...
We present photometric typing analyses of three young supernovae observed with the Robotic 60-inch Telescope at Palomar Observatory (P60). This represents the first time that such photo-typing has...
The Radio and X-ray Luminous Type Ibc Supernova 2003L (2004)
Soderberg, A. M., Kulkarni, S. R., Berger, E., Chevalier, R. A., Frail, D. A., Fox, D. B., ...
We present extensive radio observations of SN 2003L, the most luminous and energetic Type Ibc radio supernova with the exception of SN 1998bw (associated with GRB 980425). Observations from the Very...
RADII and Effective Temperatures for G,K and M Giants and Supergiants (2004)
Van Belle, G. T., Lane, B. F., Thompson, R. R., Boden, A. F., Colavita, M. M., Mobley, D. W., ...
Interferometrically determined angular diameters obtained at the Palomar Testbed Interferometer (PTI) for 80 giant and supergiant stars are presented in this paper.
An Interferometric Search for Bright Companions to 51 Pegasi (2004)
Boden, A. F., Van Belle, G. T., Colavita, M. M., Dumont, P. J., Gubler, J., Koresko, C. D., ...
We report on a near-infrared, long-baseline interferometric search for luminous companions to the star 51 Pegasi conducted with the Palomar Testbed Interferometer. Our data is completely consistent...
Exceptional stars origins, companions, masses and planets (2004)
Kulkarni, S. R., Vasisht, G., Hansen, B. M. S., Kerkwijk, M. H. Van, Phinney, S.
A distance of 133-137 parsecs to the Pleiades star cluster (2004)
Pan, X., Shao, M., Kulkarni, S. R.
Nearby open clusters of stars (those that are not gravitationally bound)have played a crucial role in the development of steller astronomy because, as a consequence of the stars having a common age,...
The sub-energetic GRB 031203 as a cosmic analogue to GRB 980425 (2004)
Soderberg, A. M., Kulkarni, S. R., Berger, E., Fox, D. W., Sako, M., Frail, D. A., ...
Over the six years since the discovery of the gamma-ray burst GRB 980425, associated with the nearby (distance, ~40 Mpc) supernova 1998bw, astronomers have fiercely debated the nature of this event....
Accurate Calorimetry of GRB 030329 (2004)
Frail, D. A., Soderberg, A. M., Kulkarni, S. R., Berger, E., Yost, S. A., Fox, D. W., ...
We report late-time observations of the radio afterglow of GRB 030329. The light curves show a clear achromatic flattening at 50 days after the explosion. We interpret this flattening as resulting...
Dynamical Masses of the Binary Brown Dwarf GJ 569Bab (2004)
Osorio, M. R. Zapatero, Lane, B. L., Pavlenko, Ya., Martin, E. L., Britton, M., Kulkarni, S. R.
We have obtained new images and high-resolution (R ~ 22400) near-infrared (1.2400-1.2575 micron) spectra of each component of the brown dwarf binary GJ 569Bab using the Adaptive Optics facility of...
Initial Scientific Results from Phase-Referenced Astrometry of Sub-Arcsecond Binaries (2004)
Muterspaugh, Matthew W., Lane, Benjamin F., Burke, B. F., Konacki, Maciej, Kulkarni, S. R.
The Palomar Testbed Interferometer has observed several binary star systems whose separations fall between the interferometric coherence length (a few hundredths of an arcsecond) and the typical...
The Non-Relativistic Evolution of GRBs 980703 and 970508: Beaming-Independent Calorimetry (2004)
Berger, E., Kulkarni, S. R., Frail, D. A.
We use the Sedov-Taylor self-similar solution to model the radio emission from the gamma-ray bursts (GRBs) 980703 and 970508, when the blastwave has decelerated to non-relativistic velocities. This...
The Angular Size and Proper Motion of the Afterglow of GRB 030329 (2004)
Taylor, G. B., Frail, D. A., Berger, E., Kulkarni, S. R.
The bright, nearby (z=0.1685) gamma-ray burst of 29 March 2003 has presented us with the first opportunity to directly image the expansion of a GRB. This burst reached flux density levels at...
The J-band Light Curve of SN 2003lw, Associated with GRB 031203 (2004)
Gal-Yam, A., Fox, D. B., Soderberg, A. M., Kulkarni, S. R., Berger, E., ...
At z=0.1055, the gamma-ray burst GRB 031203 is one of the two nearest GRBs known. Using observations from the Very Large Array (VLA) and Chandra X-ray Observatory, we derive sub-arcsecond...
Kaplan, D. L., Frail, D. A., Gaensler, B. M., Gotthelf, E. V., Kulkarni, S. R., Slane, P. O., ...
Less than half of the SNRs within 5 kpc have identified central sources, and only three are identified as the remnants of Type Ia SNe. Here, we report a systematic effort to search for compact...
Van Kerkwijk, M. H., Kaplan, D. L., Durant, M., Kulkarni, S. R., Paerels, F.
We present X-ray spectra taken with XMM-Newton of RX J1605.3+3249, the third brightest in the class of nearby, thermally emitting neutron stars. In contrast to what is the case for the brightest...
The Swift gamma-ray burst mission (2004)
Gehrels, N., Chincarini, G., Giommi, P., Mason, K. O., Nousek, J. A., Wells, A. A., ...
Classes of uniformly starlike and convex functions (2004)
Saeid Shams, S. R. Kulkarni, Jay M. Jahangiri
Some classes of uniformly starlike and convex functions are introduced. The geometrical properties of these classes and their behavior under certain integral operators are investigated.
S B Umesh, S R Kulkarni, R Sandhya, G R Joshi, R Damle, M Ravindra
High-energy heavy ion testing of VLSI devices for single
Classes of uniformly starlike and convex functions (2004)
Saeid Shams, S. R. Kulkarni, Jay M. Jahangiri
Some classes of uniformly starlike and convex functions are introduced. The geometrical properties of these classes and their behavior under certain integral operators are investigated.
The detailed optical light curve of GRB 030329 (2003)
Lipkin, Y. M., Ofek, E. O., Gal-Yam, A., Leibowitz, E. M., Poznanski, D., Kaspi, S., ...
(Abridged) We present densely sampled BVRI light curves of the optical transient associated with the gamma-ray burst GRB 030329, the result of a coordinated observing campaign conducted at five...
PSR J1909-3744, a Binary Millisecond Pulsar with a Very Small Duty Cycle (2003)
Jacoby, B. A., Bailes, M., Van Kerkwijk, M. H., Ord, S., Hotan, A., Kulkarni, S. R., ...
We report the discovery of PSR J1909-3744, a 2.95 millisecond pulsar in a nearly circular 1.53 day orbit. Its narrow pulse width of 43 microseconds allows pulse arrival times to be determined with...
A Redshift Determination for XRF 020903: First Spectroscopic Observations of an X-Ray Flash (2003)
Soderberg, A. M., Kulkarni, S. R., Berger, E., Fox, D. B., Price, P. A., Yost, S. A., ...
We report the discovery of optical and radio afterglow emission from the extremely soft X-ray flash, XRF 020903. Our spectroscopic observations provide the first redshift for an X-ray flash, thereby...
A Search for X-Ray Flashes with XMM-Newton (2003)
Law, N. M., Rutledge, R. E., Kulkarni, S. R.
We searched for X-ray flashes (XRFs) -- which we defined as ~10s duration transient X-ray events observable in the 0.4-15 keV passband -- in fields observed using XMM-Newton with the EPIC/pn...
The bright optical afterglow of the nearby gamma-ray burst of 29 March 2003 (2003)
Price, P. A., Fox, D. W., Kulkarni, S. R., Peterson, B. A., Schmidt, B. P., Soderberg, A. M., ...
Many past studies of cosmological gamma-ray bursts (GRBs) have been limited because of the large distance to typical GRBs, resulting in faint afterglows. There has long been a recognition that a...
A Late-Time Flattening of Afterglow Light Curves (2003)
Frail, D. A., Metzger, B. D., Berger, E., Kulkarni, S. R., Yost, S. A.
We present a sample of radio afterglow light curves with measured decay slopes which show evidence for a flattening at late times compared to optical and X-ray decay indices. The simplest origin for...
A Common Origin for Cosmic Explosions Inferred from Fireball Calorimetry (2003)
Berger, E., Kulkarni, S. R., Pooley, G., Frail, D. A., McIntyre, V., Wark, R. M., ...
Past studies suggest that long-duration gamma-ray bursts (GRBs) have a standard energy of E_gamma ~ 10^51 erg in ultra-relativistic ejecta when corrected for asymmetry ("jets"). However, recently a...
Millimeter Observations of GRB 030329: Continued Evidence for a Two-Component Jet (2003)
Sheth, K., Frail, D. A., White, S., Das, M., Bertoldi, F., Walter, F., ...
We present the results of a dedicated campaign on the afterglow of GRB 030329 with the millimeter interferometers of the Owens Valley Radio Observatory (OVRO), the Berkeley-Illinois-Maryland...
Optical-Infrared ANDICAM Observations of the Transient Associated with GRB 030329 (2003)
Bloom, J. S., Van Dokkum, P. G., Bailyn, C. D., Buxton, M. M., Kulkarni, S. R., Schmidt, B. P.
We present photometry of the transient associated with GRB 030329 obtained with the CTIO 1.3--meter telescope and the ANDICAM instrument, a dual optical/infrared imager with a dichroic centered at...
A Radio Survey of Type Ib and Ic Supernovae: Searching for Engine Driven Supernovae (2003)
Berger, E., Kulkarni, S. R., Frail, D. A., Soderberg, A. M.
The association of gamma-ray bursts (GRBs) and core-collapse supernovae (SNe) of Type Ib and Ic was motivated by the detection of SN 1998bw in the error box of GRB 980425 and the now-secure...
The First Two Host Galaxies of X-ray Flashes: XRF 011030 and XRF 020427 (2003)
Bloom, J. S., Fox, D., Van Dokkum, P. G., Kulkarni, S. R., Berger, E., Djorgovski, S. G., ...
Given the paucity of empirical constraints, the nature of the newly-recognized phenomena called X-Ray Flashes (XRFs) has been an open question. However, with the recent detections of radio and X-ray...
Temperature and cooling age of the white dwarf companion of PSR J0218+4232 (2003)
Bassa, C. G., Van Kerkwijk, M. H., Kulkarni, S. R.
We report on Keck optical BVRI images and spectroscopy of the companion of the binary millisecond pulsar PSR J0218+4232. A faint bluish (V=24.2, B-V=0.25) counterpart is observed at the pulsar...
The Nearby Neutron Star RX J0720.4-3125 from Radio to X-rays (2003)
Kaplan, D. L., Van Kerkwijk, M. H., Marshall, H. L., Jacoby, B. A., Kulkarni, S. R., Frail, D. A.
We present radio, optical, ultraviolet, and X-ray observations of the isolated, thermally-emitting neutron star RX J0720.4-3125 using the Parkes radio telescope, the Very Large Array, the Hubble...
The Optical Counterpart of the Isolated Neutron Star RX J1605.3+3249 (2003)
Kaplan, D. L., Kulkarni, S. R., Van Kerkwijk, M. H.
We have detected the optical counterpart to the nearby isolated neutron star RX J1605.3+3249 using observations from the Space Telescope Imaging Spectrometer aboard the Hubble Space Telescope. The...
GRB Energetics and the GRB Hubble Diagram: Promises and Limitations (2003)
Bloom, J. S., Frail, D. A., Kulkarni, S. R.
We present a complete sample of 29 GRBs for which it has been possible to determine temporal breaks (or limits) from their afterglow light curves. We interpret these breaks within the framework of...
Cosmological Uses of Gamma-Ray Bursts (2003)
Djorgovski, S. G., Kulkarni, S. R., Frail, D. A., Harrison, F. A., Bloom, J. S., Berger, E., ...
Studies of the cosmic gamma-ray bursts (GRBs) and their host galaxies are starting to provide interesting or even unique new insights in observational cosmology. GRBs represent a new way of...
Berger, E., Soderberg, A. M., Frail, D. A., Kulkarni, S. R.
We present radio observations of GRB 020405 starting 1.2 days after the burst, which reveal a rapidly-fading ``radio flare''. Based on its temporal and spectral properties, we interpret the radio...
The Broadband Afterglow of GRB980703 (2003)
Frail, D. A., Yost, S. A., Berger, E., Harrison, F. A., Sari, R., Kulkarni, S. R., ...
We present radio observations of the afterglow of the bright gamma-ray burst GRB980703 made between one day and one year after the burst. These data are combined with published late-time radio...
Micro-second Timing of PSR B1821-24 with Chandra/HRC-S (2003)
Rutledge, Robert E., Fox, Derek W., Kulkarni, S. R., Jacoby, Bryan A., Cognard, I., Backer, D. C., ...
We perform absolute timing of PSR B1821-24 in M28, using a 50 ksec observation with Chandra/HRC-S. We have obtained the highest signal-to-noise X-ray pulsed lightcurve of this source to date,...
Discovery of Early Optical Emission from GRB 021211 (2003)
Fox, D. W., Price, P. A., Soderberg, A. M., Berger, E., Kulkarni, S. R., Sari, R., ...
We report our discovery and early time optical, near-infrared, and radio wavelength follow-up observations of the afterglow of the gamma-ray burst GRB 021211. Our optical observations, beginning 21...
The Cosmic Gamma-Ray Bursts and Their Host Galaxies in a Cosmological Context (2003)
Djorgovski, S. G., Kulkarni, S. R., Frail, D. A., Harrison, F. A., Bloom, J. S., Berger, E., ...
Studies of the cosmic gamma-ray bursts (GRBs) and their host galaxies are now starting to provide interesting or even unique new insights in observational cosmology. Observed GRB host galaxies have a...
A Standard Kinetic Energy Reservoir in Gamma-Ray Burst Afterglows (2003)
Berger, E., Kulkarni, S. R., Frail, D. A.
We present a comprehensive sample of X-ray observations of 41 gamma-ray burst (GRB) afterglows, as well as jet opening angles, \theta_j for a subset with measured jet breaks. We show that there is a...
Hubble Space Telescope and Ground-Based Optical and Ultraviolet Observations of GRB010222 (2003)
Galama, T. J., Reichart, D., Brown, T. M., Kimble, R. A., Price, P. A., Berger, E., ...
We report on Hubble Space Telescope WFPC2 optical and STIS near ultraviolet MAMA observations, and ground-based optical observations of GRB010222, spanning 15 hrs to 71 days. The observations are...
Millimeter observations of GRB 030329 : continued evidence for a two-component jet (2003)
Sheth, K., Frail, D. A., White, S., Das, M., Bertoldi, F., Walter, F., ...
We present the results of a dedicated campaign on the afterglow of GRB 030329 with the millimeter interferometers of the Owens Valley Radio Observatory (OVRO) and the Berkeley-Illinois-Maryland...
Optical Spectropolarimetry of the GRB 020813 Afterglow (2002)
Barth, A. J., Sari, R., Cohen, M. H., Goodrich, R. W., Price, P. A., Fox, D. W., ...
The optical afterglow of gamma-ray burst 020813 was observed for 3 hours with the LRIS spectropolarimeter at the Keck-I telescope, beginning 4.7 hours after the burst was detected by HETE-2. The...
Bloom, J. S., Berger, E., Kulkarni, S. R., Djorgovski, S. G., Frail, D. A.
Using the Echellete Spectrograph Imager (ESI) on the Keck II 10-m telescope we have measured the redshifts of the host galaxies of gamma-ray bursts GRB 990506 and GRB 000418, z=1.30658 +/- 0.00004...
Continued Radio Monitoring of the Gamma Ray Burst 991208 (2002)
Galama, T. J., Frail, D. A., Sari, R., Berger, E., Taylor, G. B., Kulkarni, S. R.
We present radio observations of the afterglow of the bright gamma-ray burst GRB 991208 at frequencies of 1.4, 4.9 and 8.5 GHz, taken between two weeks and 300 days after the burst. The well-sampled...
Berger, E., Cowie, L. L., Kulkarni, S. R., Frail, D. A., Aussel, H., Barger, A. J.
We present the first comprehensive search for submillimeter and radio emission from the host galaxies of twenty well-localized gamma-ray bursts (GRBs). With the exception of a single source, all...
A Probable Optical Counterpart for the Isolated Neutron Star RX J1308.6+2127 (2002)
Kaplan, D. K., Kulkarni, S. R., Van Kerkwijk, M. H.
Using a very deep observation with HST/STIS, we have searched for an optical counterpart to the nearby radio-quiet isolated neutron star RX J1308.6+2127 (RBS 1223). We have identified a single object...
The Quiescent Counterpart of the Soft Gamma-ray Repeater SGR 0526-66 (2002)
Kulkarni, S. R., Kaplan, D. L., Marshall, H. L., Frail, D. A., Murakami, T., Yonetoku, D.
It is now commonly believed that Soft gamma-ray repeaters (SGRs) and Anomalous X-ray pulsars (AXPs) are magnetars -- neutron stars powered by their magnetic fields. However, what differentiates these...
Discovery of GRB 020405 and its Late Red Bump (2002)
Price, P. A., Kulkarni, S. R., Berger, E., Fox, D. W., Bloom, J. S., Djorgovski, S. G., ...
We present the discovery of GRB 020405 made with the Inter-Planetary Network (IPN). With a duration of 60 s, the burst appears to be a typical long duration event. We observed the 75-square acrminute...
Berger, E., Kulkarni, S. R., Bloom, J. S., Price, P. A., Fox, D. W., Frail, D. A., ...
We present ground-based optical observations of GRB 020124 starting 1.6 hours after the burst, as well as subsequent Very Large Array (VLA) and Hubble Space Telescope (HST) observations. The optical...
GRB 010921: Strong Limits on an Underlying Supernova from HST (2002)
Price, P. A., Kulkarni, S. R., Schmidt, B. P., Galama, T. J., Bloom, J. S., Berger, E., ...
GRB 010921 was the first HETE-2 GRB to be localized via its afterglow emission. The low-redshift of the host galaxy, z=0.451, prompted us to undertake intensive multi-color observations with the...
Time-Dependent Optical Spectroscopy of GRB 010222: Clues to the GRB Environment (2002)
Mirabal, N., Halpern, J. P., Kulkarni, S. R., Castro, S., Bloom, J. S., Djorgovski, S. G., ...
We present sequential optical spectra of the afterglow of GRB 010222 obtained one day apart using the Low Resolution Imaging Spectrometer (LRIS) and the Echellette Spectrograph and Imager (ESI) on...
The Radio Evolution of the Ordinary Type Ic SN 2002ap (2002)
Berger, E., Kulkarni, S. R., Chevalier, R. A.
We report the discovery and monitoring of radio emission from the Type Ic SN 2002ap ranging in frequency from 1.43 to 22.5 GHz, and in time from 4 to 50 days after the SN explosion. As in most other...
X-ray Timing of the Enigmatic Neutron Star RX J0720.4-3125 (2002)
Kaplan, D. L., Kulkarni, S. R., Van Kerkwijk, M. H., Marshall, H. L.
RX J0720.4-3125 is the third brightest neutron star in the soft X-ray sky and has been a source of mystery since its discovery, as its long 8-s period separates it from the population of typical...
The Broadband Afterglow of GRB980329 (2002)
Yost, S. A., Frail, D. A., Harrison, F. A., Sari, R., Reichart, D., Bloom, J. S., ...
We present radio observations of the afterglow of the bright gamma-ray burst GRB980329 made between one month and several years after the burst, a re-analysis of previously published submillimeter...
GRB 011121: A Massive Star Progenitor (2002)
Price, P. A., Berger, E., Reichart, D. E., Kulkarni, S. R., Subrahmanyan, R., Wark, R. M., ...
Of the cosmological gamma-ray bursts, GRB 011121 has the lowest redshift, z=0.36. More importantly, the multi-color excess in the afterglow detected in the Hubble Space Telescope (HST) light curves...
Detection of a supernova signature associated with GRB 011121 (2002)
Bloom, J. S., Kulkarni, S. R., Price, P. A., Reichart, D., Galama, T. J., Schmidt, B. P., ...
Using observations from an extensive monitoring campaign with the Hubble Space Telescope we present the detection of an intermediate-time flux excess which is redder in color relative to the...
Deep radio, optical, and infrared observations of SGR 1900+14 (2002)
Kaplan, D.L., Kulkarni, S.R., Frail, D.A., Kerkwijk, M.H. Van
GRB 010921: Discovery of the First HETE Afterglow (2002)
Price, P. A., Kulkarni, S. R., Berger, E., Djorgovski, S. G., Frail, D. A., Mahabal, A., ...
We report the discovery of the optical and radio afterglow of GRB 010921, the first gamma-ray burst afterglow to be found from a localization by the High Energy Transient Explorer (HETE) satellite....
GRB 010222 : a burst within a starburst (2002)
Frail, D. A., Bertoldi, F., Moriarty-Schieven, G. H., Berger, E., Price, P. A., Bloom, J. S., ...
We present millimeter- and submillimeter-wavelength observations and near-infrared K-band imaging toward the bright gamma-ray burst GRB 010222. Over seven different epochs, a constant source was...
Broad-band Modeling of GRB Afterglows (2001)
Berger, E., Sari, R., Frail, D. A., Kulkarni, S. R.
Observations of GRB afterglows ranging from radio to X-ray frequencies generate large data sets. Careful analysis of these broad-band data can give us insight into the nature of the GRB progenitor...
A possible faint near-infrared counterpart to the anomalous X-ray pulsar 1E~2259+58.6 (2001)
Hulleman, F., Tennant, A.F. Van, Kerkwijk, M.H. Van, Kulkarni, S.R., Kouveliotou, C., Patel, S.K.
Magnetospheric Structure and Non-Thermal Emission of AXPs and SGRs (2001)
Lyutikov, M., Thompson, C., Kulkarni, S. R.
In the framework of the magnetar model for the Soft Gamma Repeaters and Anomalous X-ray Pulsars, we consider the structure of neutron star magnetospheres threaded by large-scale electrical currents....
Thompson, C., Lyutikov, M., Kulkarni, S. R.
(ABBREVIATED) We consider the structure of neutron star magnetospheres threaded by large-scale electrical currents, and the effect of resonant Compton scattering by the charge carriers (both...
Eisner, J. A., Kulkarni, S. R.
The astrometric and radial velocity techniques of extra-solar planet detection attempt to detect the periodic reflex motion of the parent star by extracting this periodic signal from a time-sampled...
Keck Spectroscopy and HST Imaging of GRB 000926: Probing a Host Galaxy at z = 2. 038 (2001)
Castro, S., Galama, T. J., Harrison, F. A., Holtzman, J. A., Bloom, J. S., Djorgovski, S. G., ...
We present early-time Keck spectroscopic observations and late-time Hubble Space Telescope (HST) imaging of GRB 000926. The HST images show a small offset between the optical transient and the...
The Unusually Long Duration Gamma-ray Burst GRB 000911 (2001)
Price, P. A., Berger, E., Kulkarni, S. R., Djorgovski, S. G., Fox, D. W., Mahabal, A., ...
Of all the well localized gamma-ray bursts, GRB 000911 has the longest duration (T_90 ~ 500 s), and ranks in the top 1% of BATSE bursts for fluence. Here, we report the discovery of the afterglow of...
A possible faint near-infrared counterpart to the AXP 1E~2259+58.6 (2001)
Hulleman, F., Tennant, A. F., Van Kerkwijk, M. H., Kulkarni, S. R., Kouveliotou, C., Patel, S. K.
We present near-infrared and optical observations of the field of the Anomalous X-ray Pulsar 1E 2259+58.6 taken with the Keck telescope. We derive a subarcsecond Chandra position and tie it to our...
An unusual H-alpha nebula around RX J1856.5-3754 (2001)
Van Kerkwijk, M. H., Kulkarni, S. R.
We present spectroscopy and H alpha imaging of a faint nebula surrounding the X-ray bright, nearby neutron star RX J1856.5-3754. The nebula shows no strong lines other than the Hydrogen Balmer lines...
GRB 010222: A Burst Within a Starburst (2001)
Frail, D. A., Bertoldi, F., Moriarty-Schieven, G. H., Berger, E., Price, P. A., Bloom, J. S., ...
We present millimeter and submillimeter wavelength observations and near-infrared K-band imaging toward the bright gamma-ray burst GRB 010222. Over seven epochs the flux density of the source was...
A test of general relativity from the three-dimensional orbital geometry of a binary pulsar (2001)
Van Straten, W., Bailes, M., Britton, M. C., Kulkarni, S. R., Anderson, S. B., Manchester, R. N., ...
Binary pulsars provide an excellent system for testing general relativity because of their intrinsic rotational stability and the precision with which radio observations can be used to determine...
Precise Chandra Localization of the Soft Gamma-ray Repeater SGR 1806-20 (2001)
Kaplan, D. L., Fox, D. W., Kulkarni, S. R., Gotthelf, E. V., Vasisht, G., Frail, D. A.
We present observations of the Soft Gamma-ray Repeater SGR 1806-20 taken with the Chandra X-ray Observatory. We identify the X-ray counterpart of SGR 1806-20 based on detection of 7.5-s pulsations....
The GRB Host Galaxies and Redshifts (2001)
Djorgovski, S. G., Kulkarni, S. R., Bloom, J. S., Frail, D. A., Harrison, F. A., Galama, T. J., ...
Observations of GRB host galaxies and their environments in general can provide valuable clues about the nature of progenitors. Bursts are associated with faint, ~ 25 mag, galaxies at cosmological...
The Afterglow and the Host Galaxy of the Dark Burst GRB 970828 (2001)
Djorgovski, S. G., Frail, D. A., Kulkarni, S. R., Bloom, J. S., Odewahn, S. C., Diercks, A.
GRB 970828 was the first well-localized gamma-ray burst (GRB) X-ray afterglow for which no optical afterglow was found despite a prompt, deep search down to R_lim ~ 24.5 mag. We report the discovery...
Deep Radio, Optical, and Infrared Observations of SGR 1900+14 (2001)
Kaplan, D. L., Kulkarni, S. R., Frail, D. A., Van Kerkwijk, M. H.
We present HST/STIS, Keck J- and K_s-band, and VLA 332-MHz and 1400-MHz images of the region around the Soft Gamma-ray Repeater SGR 1900+14. No non-stellar sources were detected at the position of...
Fox, D. W., Kaplan, D. L., Kulkarni, S. R., Frail, D. A.
We present the results of Chandra, RXTE, and VLA observations of SGR 1900+14 in the immediate aftermath of its 2001 April 18 giant flare event. In the X-ray band we find the source in a pulsating and...
HST observations of SGR~0526-66: new contraints on accretion and magnetar models (2001)
Kaplan, D.L., Kulkarni, S.R., Kerkwijk, M.H. Van, Rothschild, R.E., Lingenfelter, R.L., Marsden, D., ...
The Cosmic Gamma-Ray Bursts (2001)
Djorgovski, S. G., Frail, D. A., Kulkarni, S. R., Sari, R., Bloom, J. S., Galama, T. J., ...
Cosmic gamma-ray bursts are one of the great frontiers of astrophysics today. They are a playground of relativists and observers alike. They may teach us about the death of stars and the birth of...
Sensitivity of the Astrometric Technique in Detecting Outer Planets (2001)
Eisner, J. A., Kulkarni, S. R.
With the advent of optical interferometers that will be coming online in the next decade, radial velocity searches for extra-solar planets will be complemented by high angular resolution astrometric...
Optical spectroscopy and photometry of the isolated neutron star RX J1856.5-3754 (2001)
Van Kerkwijk, M. H., Kulkarni, S. R.
We present spectroscopy and imaging with the Very Large Telescope (VLT) of the neutron star RX J1856.5-2754. Little is known about the nature of this source other than that it is a nearby hot neutron...
The orbit of the brown dwarf binary Gl 569B (2001)
Lane, B. F., Osorio, M. R. Zapatero, Britton, M. C., Martin, E. L., Kulkarni, S. R.
We present photometric, astrometric and spectroscopic observations of the nearby (9.8 pc) low-mass binary Gl 569Bab (in turn being a companion to the early-M star Gl 569A), made with the Keck...
The Host Galaxy of GRB980703 at Radio Wavelengths - a Nuclear Starburst in a ULIRG (2001)
Berger, E., Kulkarni, S. R., Frail, D. A.
We present radio observations of GRB980703 at 1.43, 4.86, and 8.46 GHz for the period of 350 to 1000 days after the burst. These radio data clearly indicate that there is a persistent source at the...
The afterglows of gamma-ray bursts (2001)
Kulkarni, S. R., Berger, E., Bloom, J. S., Chaffee, F., Diercks, A., Djorgovski, S. G., ...
Gamma-ray burst astronomy has undergone a revolution in the last three years, spurred by the discovery of fading long-wavelength counterparts. We now know that at least the long duration GRBs lie at...
Harrison, F. A., Yost, S. A., Sari, R., Berger, E., Axelrod, T., ...
GRB 000926 has one of the best-studied afterglows to-date, with multiple X-ray observations, as well as extensive multi-frequency optical and radio coverage. Broadband afterglow observations,...
HST Observations of SGR 0526-66: New Constraints on Accretion and Magnetar Models (2001)
Kaplan, D. L., Kulkarni, S. R., Van Kerkwijk, M. H., Rothschild, R. E., Lingenfelter, R. L., Marsden, D., ...
Soft Gamma-ray Repeaters (SGRs) are among the most enigmatic sources known today. Exhibiting huge X- and Gamma-ray bursts and flares, as well as soft quiescent X-ray emission, their energy source...
Intrinsic and reprocessed optical emission from the companion to PSR J2051-0827 (2001)
Stappers, B.W., Kerkwijk, M.H. Van, Bell, J.F., Kulkarni, S.R.
Discovery of Radio Emission from the Brown Dwarf LP944-20 (2001)
Berger, E., Ball, S., Becker, K. M., Clarke, M., Frail, D. A., Fukuda, T. A., ...
Brown dwarfs are classified as objects which are not massive enough to sustain nuclear fusion of hydrogen, and are distinguished from planets by their ability to burn deuterium. Old (>10 Myr) brown...
GRB 000418: A Hidden Jet Revealed? (2001)
Berger, E., Diercks, A., Frail, D. A., Kulkarni, S. R., Bloom, J. S., Sari, R., ...
We report on optical, near-infrared and centimeter radio observations of GRB000418 which allow us to follow the evolution of the afterglow from 2 to 200 days after the gamma-ray burst. In modeling...
Beaming in Gamma-Ray Bursts: Evidence for a Standard Energy Reservoir (2001)
Frail, D. A., Kulkarni, S. R., Sari, R., Djorgovski, S. G., Bloom, J. S., Galama, T. J., ...
Gamma-ray bursts (GRBs) are the most brilliant objects in the Universe but efforts to estimate the total energy released in the explosion -- a crucial physical quantity -- have been stymied by their...
Search for an Near-IR Counterpart to the Cas A X-ray Point Source (2001)
Kaplan, D. L., Kulkarni, S. R., Murray, S. S.
We report deep near-infrared and optical observations of the X-ray point source in the Cassiopeia A supernova remnant, CXO J232327.9+584842. We have identified a J=21.4 +/- 0.3 mag and Ks=20.5 +/-...
Coronagraphic Survey for Companions of Stars within 8 pc (2001)
Oppenheimer, B. R., Golimowski, D. A., Kulkarni, S. R., Matthews, K., Nakajima, T., Creech-Eakman, M., ...
We present the technique and results of a survey of stars within 8 pc of the Sun with declinations $\bf\delta > -35\arcdeg$ (J2000.00). The survey, designed to find without color bias faint...
A test of general relativity from the three-dimensional orbital geometry of a binary pulsar (2001)
Van Straten, Willem H., Bailes, Matthew, Britton, Matthew C., Kulkarni, S. R., Anderson, Stuart B., Manchester, Richard N., ...
Binary pulsars provide an excellent system for testing general relativity because of their intrinsic rotational stability and the precision with which radio observations can be used to determine...
A test of general relativity from the three-dimensional orbital geometry of a binary pulsar (2001)
Van Straten, Willem H., Bailes, Matthew, Britton, Matthew C., Kulkarni, S. R., Anderson, Stuart B., Manchester, Richard N., ...
Binary pulsars provide an excellent system for testing general relativity because of their intrinsic rotational stability and the precision with which radio observations can be used to determine...
A test of general relativity from the three-dimensional orbital geometry of a binary pulsar (2001)
Van Straten, Willem H., Bailes, Matthew, Britton, Matthew C., Kulkarni, S. R., Anderson, Stuart B., Manchester, Richard N., ...
Binary pulsars provide an excellent system for testing general relativity because of their intrinsic rotational stability and the precision with which radio observations can be used to determine...
A test of general relativity from the three-dimensional orbital geometry of a binary pulsar (2001)
Van Straten, Willem H., Bailes, Matthew, Britton, Matthew C., Kulkarni, S. R., Anderson, Stuart B., Manchester, Richard N., ...
Binary pulsars provide an excellent system for testing general relativity because of their intrinsic rotational stability and the precision with which radio observations can be used to determine...
A test of general relativity from the three-dimensional orbital geometry of a binary pulsar (2001)
Van Straten, W., Bailes, M., Britton, M. C., Kulkarni, S. R., Anderson, S. B., Manchester, R. N., ...
Binary pulsars provide an excellent system for testing general relativity because of their intrinsic rotational stability and the precision with which radio observations can be used to determine...
Multi-Color Observations of the GRB000926 Afterglow (2000)
Price, P. A., Harrison, F. A., Galama, T. J., Reichart, D. E., Axelrod, T. S., Berger, E. J., ...
We present multi-color light-curves of the optical afterglow of GRB 000926. Beginning ~1.5 days after the burst, the light-curves of this GRB steepen measurably. The existence of such achromatic...
An Optical Counterpart to the Anomalous X-ray Pulsar 4U 0142+61 (2000)
Hulleman, F., Van Kerkwijk, M. H., Kulkarni, S. R.
The energy source of the anomalous X-ray pulsars is not well understood, hence their designation as anomalous. Unlike binary X-ray pulsars, no companions are seen, so the energy cannot be supplied by...
Bloom, J. S., Kulkarni, S. R., Djorgovski, S. G.
We present a comprehensive study to measure the locations of gamma-ray bursts (GRBs) relative to their host galaxies. In total, we find the offsets of 20 long-duration GRBs from their apparent host...
A coordinated radio afterglow program (2000)
Frail, D. A., Kulkarni, S. R., Wieringa, M. H., Taylor, G. B., Moriarty-Schieven, G. H., Shepherd, D. S., ...
We describe a ground-based effort to find and study afterglows at centimeter and millimeter wavelengths. We have observed all well-localized gamma-ray bursts in the Northern and Southern sky since...
The afterglows of gamma-ray bursts (2000)
Kulkarni, S. R., Berger, E., Bloom, J. S., Chaffee, F., Diercks, A., Djorgovski, S. G., ...
Gamma-ray burst astronomy has undergone a revolution in the last three years, spurred by the discovery of fading long-wavelength counterparts. We now know that at least the long-duration GRBs lie at...
Sensitivity of the Radial Velocity Technique in Detecting Outer Planets (2000)
Eisner, J. A., Kulkarni, S. R.
The technique of radial velocity (RV) has produced spectacular discoveries of short-period Jovian mass objects around a fraction (5 to 10%) of nearby G stars. Although we expect Jovian planets to be...
Djorgovski, S. G., Bloom, J. S., Kulkarni, S. R.
We present optical and near-IR identification and spectroscopy of the host galaxy of GRB 980613. The burst was apparently associated with the optically (restframe UV) brightest component of a system...
The redshift and the ordinary host galaxy of GRB 970228 (2000)
Bloom, J. S., Djorgovski, S. G., Kulkarni, S. R.
The gamma-ray burst of 28 February 1997 (GRB 970228) ushered in the discovery of the afterglow phenomenon. Despite intense study of the host galaxy, however, the nature of the host and the distance...
The afterglows of gamma-ray bursts (2000)
Kulkarni, S. R., Berger, E., Bloom, J. S., Chaffee, F., Diercks, A., Djorgovski, S. G., ...
Gamma-ray burst astronomy has undergone a revolution in the last three years, spurred by the discovery of fading long-wavelength counterparts. We now know that at least the long duration GRBs lie at...
Galama, T. J., Bremer, M., Bertoldi, F., Menten, K. M., Lisenfeld, U., Shepherd, D. S., ...
The millimeter wavelength emission from GRB 991208 is the second brightest ever detected, yielding a unique data set. We present here well-sampled spectra and light curves over more than two decades...
A Jet Model for the Afterglow Emission from GRB000301C (2000)
Berger, E., Sari, R., Frail, D. A., Kulkarni, S. R., Bertoldi, F., Peck, A., ...
We present broad-band radio observations of the afterglow of GRB000301C, spanning from 1.4 to 350 GHz for the period of 3 to 83 days after the burst. This radio data, in addition to measurements at...
The Rapidly Fading Afterglow from the Gamma-Ray Burst of 1999 May 6 (2000)
Taylor, G. B., Bloom, J. S., Frail, D. A., Kulkarni, S. R., Djorgovski, S. G., Jacoby, B. A.
We report on the discovery of the radio afterglow from the gamma-ray burst (GRB) of 1999 May 6 (GRB 990506) using the Very Large Array (VLA). The radio afterglow was detected at early times (1.5...
The Enigmatic Radio Afterglow of GRB 991216 (2000)
Frail, D. A., Berger, E., Galama, T., Kulkarni, S. R., Moriarty-Schieven, G. H., Pooley, G. G., ...
We present wide-band radio observations spanning from 1.4 GHz to 350 GHz of the afterglow of GRB 991216, taken from 1 to 80 days after the burst. The optical and X-ray afterglow of this burst were...
Prompt and afterglow emission from the X-ray rich GRB981226 observed with BeppoSAX (2000)
Frontera, F., Antonelli, L. A., Amati, L., Montanari, E., Costa, E., Fiume, D. Dal, ...
We discuss observations of the prompt X and gamma-ray emission and X-ray afterglow from GRB981226. This event has the weakest gamma-ray peak flux detected with the Gamma-Ray Burst Monitor. It shows...
A deep search for the optical counterpart to the anomalous X-ray pulsar 1E 2259+58.6 (2000)
Hulleman, F., Van Kerkwijk, M. H., Verbunt, F. W. M., Kulkarni, S. R.
We present Keck R and I band images of the field of the anomalous X-ray pulsar 1E 2259+58.6. We derive an improved X-ray position from archival ROSAT HRI observations by correcting for systematic...
The afterglows of gamma-ray bursts (2000)
Kulkarni, S. R., Berger, E., Bloom, J. S., Chaffee, F., Diercks, A., Djorgovski, S. G., ...
Gamma-ray burst astronomy has undergone a revolution in the last three years, spurred by the discovery of fading long-wavelength counterparts. We now know that at least the long duration GRBs lie at...
Van Kerkwijk, M. H., Bell, J. F., Kaspi, V. M., Kulkarni, S. R.
We report on Keck and {\em Hubble Space Telescope} observations of the binary millisecond pulsar PSR B1855+09. We detect its white-dwarf companion and measure $\mv=25.90\pm0.12$ and...
A Coordinated Radio Afterglow Program (1999)
Frail, D. A., Kulkarni, S. R., Wieringa, M. H., Taylor, G. B., Moriarty-Schieven, G. H., Shepherd, D. S., ...
We describe a ground-based effort to find and study afterglows at centimeter and millimeter wavelengths. We have observed all well-localized gamma-ray bursts in the Northern and Southern sky since...
Mart{\'\i}n, E. L., Koresko, C. D., Kulkarni, S. R., Lane, B. F., Wizinowich, P. L.
We report observations obtained with the Keck adaptive optics facility of the nearby (d=9.8 pc) binary Gl~569. The system was known to be composed of a cool primary (dM2) and a very cool secondary...
A 450-day light curve of the radio afterglow of GRB 970508: Fireball calorimetry (1999)
Frail, D. A., Waxman, E., Kulkarni, S. R.
We report on the results of an extensive monitoring campaign of the radio afterglow of GRB 970508, lasting 450 days after the burst. The spectral and temporal radio behavior indicate that the...
The Radio Afterglow From GRB 980519: A Test of the Jet and Circumstellar Models (1999)
Frail, D. A., Kulkarni, S. R., Sari, R., Taylor, G. B., Shepherd, D. S., Bloom, J. S., ...
We present multi-frequency radio observations from the afterglow of GRB 980519 beginning 7.2 hours after the gamma-ray burst and ending 63 days later. The fast decline in the optical and X-ray light...
The Radio Afterglow and the Host Galaxy of the X-Ray Rich GRB 981226 (1999)
Frail, D. A., Kulkarni, S. R., Bloom, J. S., Djorgovski, S. G., Gorjian, V., Gal, R. R., ...
We report the discovery of a radio transient VLA 232937.2-235553, coincident with the proposed X-ray afterglow for the gamma-ray burst GRB 981226. This GRB has the highest ratio of X-ray to gamma-ray...
Van Kerkwijk, M. H., Kaspi, V. M., Klemola, A. R., Kulkarni, S. R., Lyne, A. G., Van Buren, D.
We report on Keck and Hubble Space Telescope optical observations of the eclipsing binary pulsar system PSR B1718-19, in the direction of the globular cluster NGC 6342. These reveal a faint star...
Parallax of PSR J1744-1134 and the Local Interstellar Medium (1999)
Toscano, M., Britton, M. C., Manchester, R. N., Bailes, M., Sandhu, J. S., Kulkarni, S. R., ...
We present the annual trigonometric parallax of PSR J1744-1134 derived from an analysis of pulse times of arrival. The measured parallax, pi = 2.8+/-0.3 mas ranks among the most precisely determined...
SN1998bw: The Case for a Relativistic Shock (1999)
Wieringa, M. H., Kulkarni, S. R., Frail, D. A.
SN1998bw shot to fame by claims of association with GRB980425. Independent of its presumed association with a GRB, this SN is unusual in its radio properties. A simple interpretation of the unusually...
Optical and Radio Observations of the Afterglow from GRB990510: Evidence for a Jet (1999)
Harrison, F. A., Bloom, J. S., Frail, D. A., Sari, R., Kulkarni, S. R., Djorgovski, S. G., ...
We present multi-color optical and two-frequency radio observations of the bright SAX event, GRB 990510. The well-sampled optical decay, together with the radio observations are inconsistent with...
The unusual afterglow of GRB 980326: evidence for the gamma-ray burst/supernova connection (1999)
Bloom, J. S., Kulkarni, S. R., Djorgovski, S. G., Eichelberger, A. C., Cote, P., Blakeslee, J. P., ...
Cosmic gamma-ray bursts (GRBs) have been firmly established as one of the most powerful phenomena in the Universe, releasing electromagnetic energy approaching the rest-mass energy of a neutron star...
Discovery of a Radio Flare from GRB 990123 (1999)
Kulkarni, S. R., Frail, D. A., Sari, R., Moriarty-Schieven, G. H., Shepherd, D. S., Udomprasert, P., ...
We report the discovery of a radio counterpart to GRB 990123. In contrast to previous well-studied radio afterglows which rise to peak flux on a timescale of a week and then decay over several weeks...
The afterglow, the redshift, and the extreme energetics of the gamma-ray burst 990123 (1999)
Kulkarni, S. R., Djorgovski, S. G., Odewahn, S. C., Bloom, J. S., Gal, R. R., Koresko, C. D., ...
Afterglow, or long-lived emission, has now been detected from about a dozen well-positioned gamma-ray bursts. Distance determinations made by measuring optical emission lines from the host galaxy, or...
A Massive White Dwarf Companion to the Eccentric Binary Pulsar System PSR B2303+46 (1999)
Van Kerkwijk, M. H., Kulkarni, S. R.
Pulsars in close, eccentric binary systems are usually assumed to have another neutron star as a companion. These double neutron star binaries have proven to be the best laboratories for experimental...
The Palomar Testbed Interferometer (1999)
M. M. Colavita, J. K. Wallace, B. E. Hines, Y. Gursel, F. Malbet, D. L. Palmer, ...
The Palomar Testbed Interferometer (PTI) is a long-baseline infrared interferometer located at Palomar Observatory, California. It was built as a testbed for interferometric techniques applicable to...
A Relativistic Particle Outburst From The Soft Gamma-Ray Repeater SGR1900+14 (1998)
Frail, D. A., Kulkarni, S. R., Bloom, J. S.
Soft gamma-ray repeaters (SGR) are a class of high energy transients whose brief emissions are thought to arise from young and highly magnetized neutron stars. The exact cause for these outbursts and...
Oppenheimer, Ben R., Kulkarni, S. R., Stauffer, John R.
After a discussion of the physical processes in brown dwarfs, we present a complete, precise definition of brown dwarfs and of planets inspired by the internal physics of objects between 0.1 and...
Millisecond Pulsar Velocities (1998)
Toscano, M., Sandhu, J. S., Bailes, M., Manchester, R. N., Britton, M. C., Kulkarni, S. R., ...
We present improved timing parameters for 13 millisecond pulsars (MSPs) including 9 new proper motion measurements. These new proper motions bring to 23 the number of MSPs with measured transverse...
The Discovery and Broad-band Follow-up of the Transient Afterglow of GRB 980703 (1998)
Bloom, J. S., Frail, D. A., Kulkarni, S. R., Djorgovski, S. G., Halpern, J. P., Marzke, R. O., ...
We report on the discovery of the radio, infrared and optical transient coincident with an X-ray transient proposed to be the afterglow of GRB 980703. At later times when the transient has faded...
Spectroscopy of the Host Galaxy of the Gamma--Ray Burst 980703 (1998)
Djorgovski, S. G., Kulkarni, S. R., Bloom, J. S., Goodrich, R., Frail, D. A., Piro, L., ...
We present spectroscopic observations of the host galaxy of the gamma-ray burst (GRB) 980703. Several emission and absorption features are detected, making the redshift, z = 0.966, completely...
The spectrum of the brown dwarf Gliese 229B (1998)
Oppenheimer, B.R., Kulkarni, S.R., Matthews, K., Kerkwijk, M.H. Van
The Host Galaxy of GRB 970508 (1998)
Bloom, J. S., Djorgovski, S. G., Kulkarni, S. R., Frail, D. A.
We present late-time imaging and spectroscopic observations of the optical transient (OT) of gamma-ray burst (GRB) 970508. Imaging observations roughly 200 and 300 days after the burst provide...
How Common Are Magnetars? The Consequences of Magnetic-Field Decay (1998)
Heyl, Jeremy S., Kulkarni, S. R.
Ultramagnetized neutron stars or magnetars have been invoked to explain several astrophysical phenomena. We examine how the magnetic field of a magnetar will decay over time and how this decay...
The Host Galaxy of the Gamma--Ray Burst 971214 (1998)
Odewahn, S. C., Djorgovski, S. G., Kulkarni, S. R., Dickinson, M., Frail, D. A., Ramaprakash, A. N., ...
We report on Hubble Space Telescope (HST) observations of the host galaxy of GRB 971214, about four months after the burst. The redshift of the proposed host galaxy at z=3.418, combined with optical...
Expected characteristics of the subclass of Supernova Gamma-ray Bursts (S-GRBs) (1998)
Bloom, J. S., Kulkarni, S. R., Harrison, F., Prince, T., Phinney, E. S., Frail, D. A.
The spatial and temporal coincidence between the gamma-ray burst (GRB) 980425 and supernova (SN) 1998bw has prompted speculation that there exists a class of GRBs produced by SNe (``S-GRBs''). Robust...
Kulkarni, S. R., Frail, D. A., Wieringa, M. H., Ekers, R. D., Sadler, E. M., Wark, R. M., ...
Supernova SN 1998bw exploded in the same direction and at the same time as the gamma-ray burst GRB 980425. Here we report radio observations of this type Ic supernova, beginning 4 days after the...
The Discovery of the Radio Afterglow From the Optically Dim Gamma-Ray Burst of March 29, 1998 (1998)
Taylor, G. B., Frail, D. A., Kulkarni, S. R., Shepherd, D. S., Feroci, M., Frontera, F.
We report on the discovery of a variable radio source, VLA J070238.0+385044, associated with the proposed x-ray counterpart, 1SAX J0702.6+3850 of GRB 980329. The source was monitored from one day...
No Radio Afterglow from the Gamma-Ray Burst of February 28, 1997 (1998)
Frail, D. A., Kulkarni, S. R., Shepherd, D. S., Waxman, E.
We present radio observations of the gamma-ray burster GRB 970228 made with the Very Large Array (VLA) and the Owens Valley Radio Observatory (OVRO) spanning a range of postburst timescales from one...
Optical Observations of the Isolated Neutron Star RX J0720.4-3125 (1998)
Kulkarni, S. R., Van Kerkwijk, M. H.
RX J0720.4-3125 is an unidentified bright soft X-ray source which shows pulsations at a 8.39 s period and has a thermal spectrum. We present deep B and R band images of its X-ray localization. We...
The Spectrum of the Brown Dwarf Gliese 229B (1998)
Oppenheimer, B. R., Kulkarni, S. R., Matthews, K., Van Kerkwijk, M. H.
We present a spectrum of the cool (T_eff = 900 K) brown dwarf Gliese 229B. This spectrum, with a relatively high signal-to-noise ratio per spectral resolution element (> 30), spans the wavelength...
The light curve of the companion to PSR J2051-0827 (1998)
Stappers, B.W., Kerkwijk, M.H. Van, Lane, B.F., Kulkarni, S.R.
An Unusual X-ray Burst from the Globular Cluster M28 (1997)
Gotthelf, E. V., Kulkarni, S. R.
We report the discovery of an unusual X-ray burst from the direction of the Globular Cluster M28 using data acquired with the ASCA Observatory. The burst was recorded by all four ASCA telescopes and...
Radio Monitoring of the January 11, 1997 Gamma-Ray Burst (1997)
Frail, D. A., Kulkarni, S. R., Costa, E., Frontera, F., Heise, J., Feroci, M., ...
We report on a comprehensive radio monitoring program of the bright gamma-ray burster GRB970111. These VLA observations were made at a frequency of 1.4 GHz and span a range of post-burst timescales...
Covering Numbers for Real-Valued Function Classes (1997)
P.L. Bartlett, S. R. Kulkarni, S.E. Posner
We find tight upper and lower bounds on the growth rate for the covering numbers of functions of bounded variation in the L 1 metric in terms of all the relevant constants. We also find upper and...
The Near-infrared Spectrum of the Brown Dwarf Gliese 229B (1996)
Geballe, T. R., Kulkarni, S. R., Woodward, C. E., Sloan, G. C.
A medium resolution 1.0-2.5um spectrum of the brown dwarf, Gliese 229B has been obtained using CGS4 on UKIRT. In addition to the broad spectral structure seen in earlier low resolution observations,...
The masses of the millisecond pulsar J1012+5307 and its white-dwarf companion (1996)
Van Kerkwijk, M. H., Bergeron, P., Kulkarni, S. R.
We report on spectroscopy of the white-dwarf companion of the millisecond radio pulsar PSR J1012+5307. We find strong Balmer absorption lines, as would be expected for a cool DA white dwarf. The...
Spectroscopy of the white-dwarf companions of PSR~0655+64 and 0820+02 (1995)
Van Kerkwijk, M. H., Kulkarni, S. R.
We present spectra of the white-dwarf companions of the radio pulsars 0655+64 and 0820+02. For the latter, we find a spectrum showing strong lines of hydrogen, i.e., that of a DA star. From modelling...
Optical Observations of the Binary Millisecond Pulsars J2145-0750 and J0034-0534 (1995)
Bell, J. F., Kulkarni, S. R., Bailes, M., Leitch, E. M., Lyne, A. G.
We report on optical observations of the low-mass binary millisecond pulsar systems J0034-0534 and J2145-0750. A faint (I=23.5) object was found to be coincident with the timing position of PSR...
A Luminous Companion to SGR 1806-20 (1995)
Van Kerkwijk, M. H., Kulkarni, S. R., Matthews, K., Neugebauer, G.
We have obtained infrared spectra of the star suggested to be the counterpart of the soft gamma-ray repeater (SGR) 1806-20. We found strong emission lines similar to those seen in the spectra of the...
Optical and Infrared Observations of SGR 1806-20 (1994)
Kulkarni, S. R., Matthews, K., Neugebauer, G., Reid, I. N., Van Kerkwijk, M. H., Vasisht, G.
The soft gamma-ray repeater (SGR) 1806$-$20 is associated with the center-brightened non-thermal nebula G~10.0$-$0.3, thought to be a plerion. As in other plerions, a steady \Xray\ source,...
Vasisht, G., Frail, D. A., Kulkarni, S. R.
We report the results of radio flux-monitoring and high resolution observations at 3.6 cm with the VLA, of the central condensation in G10.0-0.3, the radio nebula surrounding the soft gamma ray...
The Radio Nebula of the Soft Gamma Ray Repeater SGR 1806-20 (1994)
Kulkarni, S. R., Frail, D. A., Kassim, N. E., Murakami, T., Vasisht, G.
Earlier we had suggested that G10.0-0.3, a non-thermal nebula, most likely an old supernova remnant (SNR), was associated with the soft gamma repeater (SGR) SGR 1806-20. Here we present new radio...
Reduction of timed hybrid systems (1994)
S. Di Gennaro, C. Horn, S. R. Kulkarni
Abstract. We consider a class of hybrid dynamical systems and obtain conditions under which the behavior of these systems can be reduced to a finite state automaton. Specifically, we consider timed...
Active learning using arbitrary binary valued queries (1993)
S. R. Kulkarni, David Haussler
Abstract. The original and most widely studied PAC model for learning assumes a passive learner in the sense that the learner plays no role in obtaining information about the unknown concept. That...
A Paradigm for Class Identification Problems (1992)
The following problem arises in many applications involving classification, identification, and inference. There is a set of objects X, and a particular x 2 X is chosen (unknown to us). Based on...
PAC LEARNING WITH GENERALIZED SAMPLES AND AN APPLICATION TO STOCHASTIC GEOMETRY 1 (1991)
Kulkami S. R, Mitter S. K, Tsitsiklis J. N, Zeitouni O, S. R. Kulkarni, S. K. Mitter, ...
In this paper, we introduce an extension of the standard PAC model which allows the use of generalized samples. We view a generalized sample as a pair consisting of a functional on the concept class...
Discovery of two radio pulsars in the globular cluster M15 (1990)
S. B. Anderson, P. W. Gorham, S. R. Kulkarni, T. A. Prince, A. Wolszczan
We report the discovery of two radio pulsars, 2127+11B and 2127+11C, in the globular cluster M15 (NGC 7078), which also contains the 110-ms pulsar 2127+11A (Wolszczan et al. 1989). Although only...
'Laboratory for Information and Decision Systems, M.I.T. (1990)
S. R. Kulkarni, S. K. Mitterl, J. N. Tsitsiklisl
The original and most widely studied PAC model for learning assumes a passive learner in the sense that the learner plays no role in obtaining information about the unknown concept. That is, the...
Gogate, P M, Deshpande, M, Wormald, R P, Deshpande, R, Kulkarni, S R
Aim: To study “manual small incision cataract surgery (MSICS)” for the rehabilitation of cataract visually impaired and blind patients in community based, high volume, eye hospital setting; to...
Multivariate Quality Control Chart for Autocorrelated Processes
A. A. Kalgonda, S. R. Kulkarni
Traditional multivariate statistical process control (SPC) techniques are based on the assumption that the successive observation vectors are independent. In recent years, due to automation of...