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...
,F =2→1) toward three Galactic supernova remnants: W 28, (2009)
M. J Claussen, D. A. Frail, W. M. Goss, R. A. Gaume, Mhz Π
We present arcsecond resolution observations from the VLA1 with full Stokes polarimetry of the ground-state satellite line of the hydroxyl molecule (OH) at 1720.53
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...
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...
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...
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...
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...
Jun-hui Zhao, Jun-hui Zhao, D. A. Roberts, W. M. Goss, D. A. Frail, National Radio, ...
(thecompactradiosourceattheGalacticcenter):F ollowingitsfirstdetection; thef luxdensityoftheGalacticCenterTransient(GCT)increasedrapidlytoamaximumonemonthlater;...
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...
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...
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...
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...
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...
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...
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...
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...
Stern, D., Van Dokkum, P. G., Nugent, P., Sand, D. J., Bloom, J. S., Ellis, R. S., ...
We report the discovery of a transient source in the central regions of galaxy cluster Abell 267.
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...
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...
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 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...
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...
Smith, I. A., Tilanus, R. P. J., Tanvir, N., Barnard, V. E., Moriarty-Schieven, G. H., Frail, D. A., ...
We discuss our ongoing program of Target of Opportunity (ToO) sub-millimeter observations of gamma-ray bursts (GRBs) using the Sub-millimetre Common-User Bolometer Array (SCUBA) on the James Clerk...
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 (~...
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., ...
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 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 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...
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....
The Crab Nebula's Wisps in Radio and Optical (2004)
Bietenholz, M. F., Hester, J. J., Frail, D. A., Bartel, N.
We present four new, high-resolution VLA radio images of the Crab nebula, taken between 2001 Feb. and Apr. The radio images show systematic variability in the Crab's radio emission throughout the...
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...
Stern, Daniel, Van Dokkum, P. G., Nugent, Peter, Sand, D. J., Ellis, R. S., Sullivan, Mark, ...
We report the discovery of a transient source in the central regions of galaxy cluster Abell 267. The object, which we call "PALS1", was found in a survey aimed at identifying highly-magnified...
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 Deep Lens Survey Transient Search I : Short Timescale and Astrometric Variability (2004)
Becker, A. C., Wittman, D. M., Boeshaar, P. C., Clocchiatti, A., Dell'Antonio, I. P., Frail, D. A., ...
We report on the methodology and first results from the Deep Lens Survey transient search. We utilize image subtraction on survey data to yield all sources of optical variability down to 24th...
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...
Constraints on Off-Axis GRB Jets in Type Ibc Supernovae From Late-Time Radio Observations (2004)
Soderberg, A. M., Frail, D. A., Wieringa, M. H.
It has been suggested that the peculiar properties of the luminous Type Ic supernova SN 1998bw and its low-energy gamma-ray burst GRB 980425 may be understood if they originated in a standard...
The Swift gamma-ray burst mission (2004)
Gehrels, N., Chincarini, G., Giommi, P., Mason, K. O., Nousek, J. A., Wells, A. A., ...
Gamma-Ray Bursts: Jets and Energetics (2003)
The relativistic outflows from gamma-ray bursts are now thought to be narrowly collimated into jets. After correcting for this jet geometry there is a remarkable constancy of both the energy radiated...
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...
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...
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...
A Study of the Afterglows of Four GRBs: Constraining the Explosion and Fireball Model (2003)
Yost, S. A., Harrison, F. A., Sari, R., Frail, D. A.
We employ a fireball model of the GRB explosion to constrain intrinsic and environmental parameters of four events with good broadband afterglow data; GRB970508, GRB980329, GRB980703, and GRB000926....
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...
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...
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...
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...
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...
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 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....
The bright Gamma-Ray Burst of February 10, 2000: a case study of an optically dark GRB (2002)
Piro, L., Frail, D. A., Gorosabel, J., Garmire, G., Soffitta, P., Amati, L., ...
The gamma-ray burst GRB000210 had the highest gamma-ray peak flux of any event localized by BeppoSAX as yet but it did not have a detected optical afterglow. It is therefore one of the events...
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...
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...
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...
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...
Afterglow upper limits for four short duration, hard spectrum gamma-ray bursts (2001)
Hurley, K., Berger, E., Castro-Tirado, A., Cerón, J. M. Castro, Cline, T., Feroci, M., ...
We present interplanetary network localization, spectral, and time history information for four short-duration, hard spectrum gamma-ray bursts, GRB000607, 001025B, 001204, and 010119. All of these...
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...
The Crab Nebula's Moving Wisps in Radio (2001)
Bietenholz, M. F., Frail, D. A., Hester, J. J.
We present three high resolution radio images of the Crab nebula, taken in 1998.6, 1998.8 and 2000.1 with the VLA. These are the best radio images of the Crab to date. We show that, near the pulsar,...
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,...
Piro, L., Garmire, G., Garcia, M. R., Antonelli, L. A., Costa, E., Feroci, M., ...
We present X-ray observations of the afterglow of GRB000926 performed around and after the break observed in the optical light curve two days after the burst. The steep X-ray light curve observed...
A Bow Shock Nebula Around a Compact X-Ray Source in the Supernova Remnant IC443 (2001)
Olbert, C. M., Clearfield, C. R., Williams, N. E., Keohane, J. W., Frail, D. A.
We present spectra and high resolution images of the hard X-ray feature along the southern edge of the supernova remnant IC443. Data from the Chandra X-ray Observatory reveal a comet-shaped nebula of...
Pulsar wind nebulae around the southern pulsars PSR B1643-43 and PSR B1706-44 (2001)
Giacani, E., Frail, D. A., Goss, W. M., Vieytes, M.
We present high resolution VLA images taken at the wavelengths of lambda 20 cm, lambda 6 cm, and lambda 3.6 cm in the vicinity of the pulsars PSR B1706-44 (PSR J1709-4428) and PSR B1643-43 (PSR...
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...
Multiwavelength Follow-Up Observations of Four Short-Duration, Hard-Spectrum Gamma-Ray Bursts (2001)
Hurley, K., Cline, T., Mazets, E., Golenetskii, S., Masetti, N., ...
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...
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...
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...
Limits on radio emission from pulsar wind nebulae (2000)
Gaensler, B. M., Stappers, B. W., Frail, D. A., Moffett, D. A., Johnston, S., Chatterjee, S.
We report on a sensitive survey for radio pulsar wind nebulae (PWN) towards 27 energetic and/or high velocity pulsars. Observations were carried out at 1.4 GHz using the Very Large Array and the...
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...
OH Zeeman Magnetic Field Detections Toward Five Supernova Remnants Using the VLA (2000)
Brogan, C. L., Frail, D. A., Goss, W. M., Troland, T. H.
We have observed the OH (1720 MHz) line in five galactic SNRs with the VLA to measure their magnetic field strengths using the Zeeman effect. We detected all 12 of the bright ($S_{\nu} > 200$ mJy) OH...
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...
Limits on radio emission from pulsar wind nebulae (2000)
Gaensler, B.M., Stappers, B.W., Frail, D.A., Moffet, D.A., Johnston, S., Chatterjee, S.
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...
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...
Yusef-Zadeh, F., Goss, W. M., Roberts, D. A., Robinson, B., Frail, D. A.
A survey of the inner 8$^\circ \times 1^\circ$ of the Galactic plane toward the Galactic center has been carried out at the 1720 MHz transition of OH molecule using the VLA in its D configuration...
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...
Claussen, M. J., Goss, W. M., Frail, D. A., Desai, K.
We have used the NRAO Very Long Baseline Array (VLBA) to image OH(1720 MHz) masers in the supernova remnants W28 and W44 at a resolution of 40 mas. We also used MERLIN to observe the same OH(1720...
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...
The Host Galaxy of GRB 990123 (1999)
Bloom, J. S., Odewahn, S. C., Djorgovski, S. G., Koresko, C., Neugebauer, G., ...
We present deep images of the field of gamma-ray burst (GRB) 990123 obtained in a broad-band UV/visible bandpass with the Hubble Space Telescope, and deep near-infrared images obtained with the...
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...
A search for pulsar wind nebulae using pulsar gating (1998)
Gaensler, B. M., Stappers, B. W., Frail, D. A., Johnston, S.
Previous searches for radio pulsar wind nebulae (PWN) suggest that only the youngest and most energetic pulsars power PWN. However the selection effects associated with such searches are severe, in...
High-resolution Observations of OH(1720 MHz) Masers Toward the Galactic Center (1998)
Yusef-Zadeh, F., Roberts, D. A., Goss, W. M., Frail, D. A., Green, A. J.
High-resolution VLA observations of 1720 MHz OH maser emission from Sgr A East and the circumnuclear disk with spatial and spectral resolutions of $\approx$ 2\dasec5 $\times$ 1\dasec3 and 0.27 \kms...
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 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...
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...
Koralesky, Barron, Frail, D. A., Goss, W. M., Claussen, M. J., Green, A. J.
We present the results of VLA observations in the ground-state hydroxyl (OH) transition at 1720 MHz toward 20 supernova remnants (SNRs). We detect compact emission from four objects. For three of...
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...
An unusual pulsar wind nebula associated with PSR B0906-49 (1998)
Gaensler, B. M., Stappers, B. W., Frail, D. A., Johnston, S.
We report on Australia Telescope Compact Array observations of the ~10^5 yr old pulsar PSR B0906-49. In an image containing only off-pulse emission, we find a weak, slightly extended source...
An X-ray pulsar with a superstrong magnetic field in the soft gamma-ray repeater SGR 1806-20 (1998)
Kouveliotou, C., Dieters, S., Strohmayer, T.E., Paradijs, J.A. Van, Fishman, G.J., Meegan, C.A., ...
OH Satellite Line Masers in the Nucleus of NGC253 (1997)
Frayer, D. T., Seaquist, E. R., Frail, D. A.
We report the detection of 1720 and 1612 MHz OH ground-state satellite line maser regions in the starburst galaxy NGC253. We find ten compact maser features all of which are located along the narrow...
OH Satellite Line Masers and an AGN Candidate in M82 (1997)
Seaquist, E. R., Frayer, D. T., Frail, D. A.
We report the detection of OH satellite line masers at 1720 MHz and 1612 MHz from the nuclear region of the starburst galaxy M82. The observations were aimed at detecting 1720 MHz maser emission from...
The Radio Spectral Index of the Crab Nebula (1997)
Bietenholz, M. F., Kassim, N., Frail, D. A., Perley, R. A., Erickson, W. C., Hajian, A. R.
We present the results of a new, comprehensive investigation of the radio spectral index of the Crab Nebula supernova remnant. New data at 74 MHz are combined with data at 327 MHz, 1.5 GHz and 5 GHz....
Claussen, M. J, Frail, D. A., Goss, W. M., Gaume, R. A.
(abridged) - We present arcsecond resolution observations from the VLA of the satellite line of the hydroxyl molecule (OH) at 1720.53 MHz toward three Galactic supernova remnants: W28, W44 and IC443....
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...
The Pulsar Wind Nebula Around PSR B1853+01 in the Supernova Remnant W44 (1996)
Frail, D. A., Giacani, E. B., Goss, W. M., Dubner, G.
We present radio observations of a region in the vicinity of the young pulsar PSR B1853+01 in the supernova remnant W44. The pulsar is located at the apex of an extended feature with cometary...
Augusteijn, T., Steene, G. Van De, Frail, D.A., Paradijs, J.A. Van, Kouveliotou, C., Fishman, G.J., ...
Does the Crab Have a Shell? (1995)
Frail, D. A., Kassim, N. E., Cornwell, T. J., Goss, W. M.
We present deep images of a region around the Crab nebula made with the VLA, utilizing new imaging and deconvolution algorithms in a search for a faint radio shell. The existence of a high-velocity,...
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 Lifetime of Supernova Remnants and the Distribution of Pulsar Velocities at Birth (1994)
Frail, D. A., Goss, W. M., Whiteoak, J. B. Z.
We have made VLA images of the fields around three young pulsars which have resulted in the discovery of two new supernova remnants and confirmation of a third. We argue that, in at least two cases...
Anisotropic Scattering of OH/IR Stars Towards the Galactic Center (1994)
Frail, D. A., Diamond, P. J., Cordes, J. M., Van Langevelde, H. J.
We have made angular broadening measurements in the satellite line of the OH molecule at 1612 MHz of 8 OH/IR stars located near the Galactic Center with the Very Large Array. Early observations with...
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...
Shock Excited Maser Emission from the Supernova Remnant W28 (1993)
Frail, D. A., Goss, W. M., Slysh, V. I.
We present VLA observations in the hydroxyl line OH(1720 MHz) towards the supernova remnant W28. These high resolution images show a more extensive distribution of 1720 MHz emission than had...