Exploring the Outer Solar System with the ESSENCE Supernova Survey (2008)
Becker, A. C., Arraki, K., Kaib, N. A., Wood-Vasey, W. M., Aguilera, C., Blackman, J. W., ...
We report the discovery and orbit determination of 14 trans-Neptunian objects (TNOs) from the ESSENCE Supernova Survey difference imaging dataset. Two additional objects discovered in a similar...
Gallagher, J. S., Garnavich, P. M., Caldwell, N., Kirshner, R. P., Jha, S. W., Li, W., ...
We have obtained optical spectra of 29 early-type (E/S0) galaxies that hosted type Ia supernovae (SNe Ia). We have measured absorption-line strengths and compared them to a grid of models to extract...
Time Dilation in Type Ia Supernova Spectra at High Redshift (2008)
Blondin, S., Davis, T. M., Krisciunas, K., Schmidt, B. P., Sollerman, J., Wood-Vasey, W. M., ...
We present multiepoch spectra of 13 high-redshift Type Ia supernovae (SNe Ia) drawn from the literature, the ESSENCE and SNLS projects, and our own separate dedicated program on the ESO Very Large...
Optical Spectroscopy of Type Ia Supernovae (2008)
Matheson, T., Kirshner, R. P., Challis, P., Jha, S., Garnavich, P. M., Berlind, P., ...
We present 432 low-dispersion optical spectra of 32 Type Ia supernovae (SNe Ia) that also have well-calibrated light curves. The coverage ranges from 6 epochs to 36 epochs of spectroscopy. Most of...
Two More Candidate AM Canum Venaticorum (AM CVn) Binaries from the Sloan Digital Sky Survey (2008)
Anderson, S. F., Becker, A. C., Haggard, D., Prieto, J. L., Knapp, G. R., Sako, M., ...
AM CVn systems are a select group of ultracompact binaries with the shortest orbital periods of any known binary subclass; mass-transfer is likely from a low-mass (partially-)degenerate secondary...
The Eclipsing Cataclysmic Variable Lanning 386: Dwarf Nova, SW Sextantis Star, or Both? (2008)
Brady, S., Thorstensen, J. R., Koppelman, M. D., Prieto, J. L., Garnavich, P. M., Hirschauer, A., ...
We present photometry and spectroscopy of the suspected cataclysmic variable (CV) Lanning 386. We confirm that it is a CV, and observe deep eclipses, from which we determine the orbital period Porb...
Dilday, Benjamin, Kessler, R., Frieman, J. A., Holtzman, J., Marriner, J., Miknaitis, G., ...
We present a measurement of the rate of type Ia supernovae (SNe Ia) from the first of three seasons of data from the SDSS-II Supernova Survey. For this measurement, we include 17 SNe Ia at redshift...
LBT discovery of a yellow supergiant eclipsing binary in the dwarf galaxy Holmberg IX (2008)
Prieto, J. L., Stanek, K. Z., Kochanek, C. S., Weisz, D. R., Baruffolo, A., Bechtold, J., ...
Go Long, Go Deep: Finding Optical Jet Breaks for Swift-Era GRBs with the LBT (2007)
Dai, X., Garnavich, P. M., Prieto, J. L., Stanek, K. Z., Kochanek, C. S., Bechtold, J., ...
Using the 8.4m Large Binocular Telescope, we observed six GRB afterglows from 2.8 hours to 30.8 days after the burst triggers to systematically probe the late time behaviors of afterglows including...
Elebert, P., Callanan, P. J., Filippenko, A. V., Garnavich, P. M., Mackie, G., Hill, J. M., ...
We present phase resolved optical photometry and spectroscopy of the accreting millisecond pulsar HETE J1900.1-2455. Our R-band light curves exhibit a sinusoidal modulation, at close to the orbital...
Constraining Cosmic Evolution of Type Ia Supernovae (2007)
Foley, Ryan J., Filippenko, A. V., Aguilera, C., Becker, A. C., Blondin, S., Challis, P., ...
We present the first large-scale effort of creating composite spectra of high-redshift type Ia supernovae (SNe Ia) and comparing them to low-redshift counterparts. Through the ESSENCE project, we...
LBT Discovery of a Yellow Supergiant Eclipsing Binary in the Dwarf Galaxy Holmberg IX (2007)
Prieto, J. L., Stanek, K. Z., Kochanek, C. S., Weisz, D. R., Baruffolo, A., Bechtold, J., ...
In a variability survey of M81 using the Large Binocular Telescope we have discovered a peculiar eclipsing binary (MV ~ -7.1) in the field of the dwarf galaxy Holmberg IX. It has a period of 272 days...
The Luminous and Carbon-Rich Supernova 2006gz: A Double Degenerate Merger? (2007)
Hicken, M., Garnavich, P. M., Prieto, J. L., Blondin, S., DePoy, D. L., Kirshner, R. P., ...
Spectra and light curves of SN 2006gz show the strongest signature of unburned carbon and one of the slowest fading light curves ever seen in a type Ia event (Delta m_15 = 0.69 +/- 0.04). The...
The Sloan Digital Sky Survey-II Supernova Survey: Technical Summary (2007)
Frieman, Joshua A., Bassett, B., Becker, A., Choi, C., Cinabro, D., DeJongh, F., ...
The Sloan Digital Sky Survey-II (SDSS-II) has embarked on a multi-year project to identify and measure light curves for intermediate-redshift (0.05 < z < 0.35) Type Ia supernovae (SNe Ia) using...
The Sloan Digital Sky Survey-II Supernova Survey: Search Algorithm and Follow-up Observations (2007)
Sako, Masao, Bassett, B., Becker, A., Cinabro, D., DeJongh, F., Depoy, D. L., ...
The Sloan Digital Sky Survey-II Supernova Survey has identified a large number of new transient sources in a 300 sq. deg. region along the celestial equator during its first two seasons of a...
A Study of the Type Ia/IIn Supernova 2005gj from X-ray to the Infrared: Paper I (2007)
Prieto, J. L., Garnavich, P. M., Phillips, M. M., DePoy, D. L., Parrent, J., Pooley, D., ...
We present extensive ugrizYHJK photometry and optical spectroscopy of SN 2005gj obtained by the SDSS-II and CSP Supernova Projects, which give excellent coverage during the first 150 days after the...
Davis, T. M., Mortsell, E., Sollerman, J., Becker, A. C., Blondin, S., Challis, P., ...
The first cosmological results from the ESSENCE supernova survey (Wood-Vasey et al. 2007) are extended to a wider range of cosmological models including dynamical dark energy and non-standard...
Modjaz, M., Kewley, L., Kirshner, R. P., Stanek, K. Z., Challis, P., Garnavich, P. M., ...
We compare the chemical abundances at the sites of 12 nearby (z
Wood-Vasey, W. M., Miknaitis, G., Stubbs, C. W., Jha, S., Riess, A. G., Garnavich, P. M., ...
We present constraints on the dark energy equation-of-state parameter, w=P/(rho c^2), using 60 Type Ia supernovae (SNe Ia) from the ESSENCE supernova survey. We derive a set of constraints on the...
The ESSENCE Supernova Survey: Survey Optimization, Observations, and Supernova Photometry (2007)
Miknaitis, G., Pignata, G., Rest, A., Wood-Vasey, W. M., Blondin, S., Challis, P., ...
We describe the implementation and optimization of the ESSENCE supernova survey, which we have undertaken to measure the equation of state parameter of the dark energy. We present a method for...
Strongly Variable z=1.48 FeII and MgII Absorption in the Spectra of z=4.05 GRB 060206 (2006)
Hao, H., Stanek, K. Z., Dobrzycki, A., Matheson, T., Bentz, M. C., Kuraszkiewicz, J., ...
We report on the discovery of strongly variable FeII and MgII absorption lines seen at z=1.48 in the spectra of the z=4.05 GRB 060206 obtained between 4.13 to 7.63 hours (observer frame) after the...
The Peculiar SN 2005hk: Do Some Type Ia Supernovae Explode as Deflagrations? (2006)
Phillips, M. M., Li, W., Frieman, J. A., Blinnikov, S. I., DePoy, D., Prieto, J. L., ...
We present extensive u'g'r'i'BVRIYJHKs photometry and optical spectroscopy of SN 2005hk. These data reveal that SN 2005hk was nearly identical in its observed properties to SN 2002cx, which has been...
A Light Echo from Type Ia Supernova 1995E? (2006)
Quinn, J. L., Garnavich, P. M., Li, W., Panagia, N., Riess, A., Schmidt, B. P., ...
We identify a light echo candidate from Hubble Space Telescope (HST) imaging of NGC 2441, the host galaxy of the Type Ia supernova 1995E. From the echo's angular size and the estimated distance to...
Long gamma-ray bursts and core-collapse supernovae have different environments (2006)
Fruchter, A.S., Levan, A.J., Strolger, L., Vreeswijk, P.M., Thorsett, S.E., Bersier, D., ...
When massive stars exhaust their fuel they collapse and often produce the extraordinarily bright explosions known as core-collapse supernovae. On occasion, this stellar collapse also powers an even...
Long gamma-ray bursts and core-collapse supernovae have different environments (2006)
Fruchter, A. S., Levan, A. J., Strolger, L., Vreeswijk, P. M., Thorsett, S. E., Bersier, D., ...
When massive stars exhaust their fuel they collapse and often produce the extraordinarily bright explosions known as core-collapse supernovae. On occasion, this stellar collapse also powers an even...
Modjaz, M., Stanek, K. Z., Garnavich, P. M., Berlind, P., Blondin, S., Brown, W., ...
We present early photometric and spectroscopic data on the afterglow of GRB 060218 and report the evolution of the underlying supernova 2006aj. Our data span a time-range of 4 days to 22 days after...
"Anomalous" Optical GRB Afterglows are Common: Two z~4 Bursts, GRB 060206 and 060210 (2006)
Stanek, K. Z., Dai, X., Prieto, J. L., An, D., Garnavich, P. M., Calkins, M. L., ...
We report on two recent z~4 gamma-ray bursts (GRBs), GRB 060206 and GRB 060210, for which we have obtained well-sampled optical light curves. Our data, combined with early optical data reported in...
Chemistry and Star Formation in the Host Galaxies of Type Ia Supervovae (2005)
Gallagher, J. S., Garnavich, P. M., Berlind, P., Challis, P., Jha, S., Kirshner, R. P.
We study the effect of environment on the properties of type Ia supernovae by analyzing the integrated spectra of 57 local type Ia supernova host galaxies. We deduce from the spectra the metallicity,...
Deep Photometry of GRB 041006 Afterglow: Hypernova Bump at Redshift z=0.716 (2005)
Stanek, K. Z., Garnavich, P. M., Nutzman, P. A., Hartman, J. D., Garg, A., Adelberger, K., ...
We present deep optical photometry of the afterglow of gamma-ray burst (GRB) 041006 and its associated hypernova obtained over 65 days after detection (55 R-band epochs on 10 different nights). Our...
Properties of Type Ia Supernova Host Galaxies (2005)
Garnavich, P. M., Gallagher, J.
We study the effect of environment on the properties of type Ia supernovae by analyzing the integrated spectra of 57 host galaxies. Integrated spectra of galaxies best represent the global properties...
HH110 Jet Near Infrared Imaging. I. The Outflow Mixing Layer? (2004)
Noriega-Crespo, A., Garnavich, P.M., Raga, A.C., Canto, J.
Near infrared images are presented of the Herbig-Haro 110 jet centered at the molecular hydrogen lines. The ratio of these lines provides a preliminary diagnostic of molecular gas excitation, which...
A Highly Collimated Molecular Hydrogen Jet in IRAS 05487+0255: NIR Imaging and Spectroscopy (2004)
Noriega-Crespo, A., Garnavich, P. M., Raga, A. C., Bohm, K. H.
Krisciunas, Kevin, Suntzeff, Nicholas B., Phillips, Mark M., Candia, Pablo, Prieto, Jose Luis, Antezana, R., ...
We present optical and/or infrared photometry of the Type Ia supernovae SN 1991T, SN 1991bg, SN 1999ek, SN 2001bt, SN 2001cn, SN 2001cz, and SN 2002bo. All but one of these supernovae have decline...
Riess, A. G., Dahlen, T., Livio, M., Panagia, N., Challis, P., ...
We present results from the Hubble Higher-z Supernova Search, the first space-based open field survey for supernovae (SNe). In cooperation with the Great Observatories Origins Deep Survey, we have...
Rapid Variations in V2275 Cyg (Nova Cyg 2001 #2) (2004)
Garnavich, P. M., Macdonald, A. J., Wu, B., Easterday, S. M., Libal, A. J., Palumbo, A., ...
We present time-resolved CCD photometry of V2275 Cyg 790 days after the nova outburst. The data show a 20% peak-to-peak oscillation with a period of 24 minutes. The period appears stable over the two...
The Type Ic Hypernova SN 2003dh/GRB 030329 (2003)
Mazzali, P. A., Deng, J., Tominaga, N., Maeda, K., Nomoto, K., Matheson, T., ...
The spectra of SN 2003dh, identified in the afterglow of GRB030329, are modeled using radiation transport codes. It is shown that SN 2003dh had a high explosion kinetic energy ($\sim 4 \times...
Matheson, T., Garnavich, P. M., Stanek, K. Z., Bersier, D., Holland, S. T., Krisciunas, K., ...
We present extensive optical and infrared photometry of the afterglow of gamma-ray burst (GRB) 030329 and its associated supernova (SN) 2003dh over the first two months after detection (2003 March...
Spectroscopic Discovery of the Supernova 2003dh Associated with GRB 030329 (2003)
Stanek, K. Z., Matheson, T., Garnavich, P. M., Martini, P., Berlind, P., Caldwell, N., ...
We present early observations of the afterglow of the Gamma-Ray Burst (GRB) 030329 and the spectroscopic discovery of its associated supernova SN 2003dh. We obtained spectra of the afterglow of GRB...
Bersier, D., Stanek, K. Z., Winn, J., Grav, T., Holman, M. J., Matheson, T., ...
We report UBVRI observations of the optical afterglow of the gamma-ray burst GRB 021004. We observed significant (10-20%) deviations from a power law decay on several time scales, ranging from a few...
The Spectroscopic Variability of GRB 021004 (2002)
Matheson, T., Garnavich, P. M., Foltz, C., West, S., Williams, G., Falco, E., ...
We present spectra of the optical transient (OT) associated with GRB 021004. The spectra show a blue continuum with superposed absorption features and one emission line. We confirm two intervening...
Disappearing Dark Matter in Brane World Cosmology: New Limits on Noncompact Extra Dimensions (2002)
Ichiki, K., Garnavich, P. M., Kajino, T., Mathews, G. J., Yahiro, M.
We explore cosmological implications of dark matter as massive particles trapped on a brane embedded in a Randall-Sundrum noncompact higher dimension $AdS_5$ space. It is an unavoidable consequence...
The Progenitor of Supernova 1993J Revisited (2002)
Van Dyk, S. D., Garnavich, P. M., Filippenko, A. V., Hoeflich, P., Kirshner, R. P., Kurucz, R. L., ...
From Hubble Space Telescope images with 0.05" resolution we identify four stars brighter than V=25 mag within 2.5" of SN 1993J in M81 which contaminated previous ground-based brightness estimates for...
The Strongly Polarized Afterglow of GRB 020405 (2002)
Bersier, D., McLeod, B., Garnavich, P. M., Holman, M. J., Grav, T., Quinn, J., ...
We report polarization measurements and photometry for the optical afterglow of the gamma-ray burst GRB 020405. We measured a highly significant 9.9% polarization (in V band) 1.3 days after the burst...
Garnavich, P. M., Stanek, K. Z., Wyrzykowski, L., Infante, L., Bendek, E., Bersier, D., ...
We present the discovery and follow-up observations of the afterglow of the GRB 011121 and its associated supernova SN 2001ke. Images were obtained with the OGLE 1.3m telescope in BVRI passbands,...
Kinematics of the HH 111 jet from STIS spectra (2001)
Raga, A. C., Noriega-Crespo, A., Reipurth, B., Garnavich, P. M., Heathcote, S., Bohm, K. H., ...
We present a long-slit spectrum of the Herbig-Haro object HH 111, obtained with SITS on the Hubble Space Telescope. This spectrum has a spectral resolution of approx. 50 km/s, so it gives a good...
Complete and simultaneous spectral observations of the black hole X-Ray nova XTE J1118+480 (2001)
McClintock, J.E., Haswell, C.A., Garcia, M.R., Drake, J.J., Hynes, R.I., Marshall, H.L., ...
The X-ray nova XTE J1118+480 suffers minimal extinction (b = 62) and therefore represents an outstanding opportunity for multiwavelength studies. Hynes et al. conducted the first such study, which...
The Discovery of Cepheids and a New Distance to NGC 2841 Using the Hubble Space Telescope (2001)
Macri, L. M., Stetson, P. B., Bothun, G. D., Freedman, W. L., Garnavich, P. M., Jha, S., ...
We report on the discovery of Cepheids in the spiral galaxy NGC 2841, based on observations made with the Wide Field and Planetary Camera 2 on board the Hubble Space Telescope. NGC 2841 was observed...
Rapid UBVRI Follow-up of the Highly Collimated Optical Afterglow of GRB010222 (2001)
Stanek, K. Z., Garnavich, P. M., Jha, S., Kilgard, R. E., McDowell, J. C., Bersier, D., ...
(Abridged) We present the earliest optical observations of the optical counterpart to the GRB 010222, obtained with the FLWO 1.2-m telescope in UBVRI passbands, starting 3.64 hours after the burst....
Complete and Simultaneous Spectral Observations of the Black-Hole X-ray Nova XTE J1118+480 (2001)
McClintock, J. E., Haswell, C. A., Garcia, M. R., Drake, J. J., Hynes, R. I., Marshall, H. L., ...
The X-ray nova XTE J1118+480 suffers minimal extinction (b = 62 degrees) and therefore represents an outstanding opportunity for multiwavelength studies. Hynes et al. (2000) conducted the first such...
A Black Hole of > 6 Solar Masses in the X-ray Nova XTE J1118+480 (2001)
McClintock, J. E., Garcia, M. R., Caldwell, N., Falco, E. E., Garnavich, P. M., Zhao, P.
Observations of the quiescent X-ray nova XTE J1118+480 with the new 6.5-m MMT have revealed that the velocity amplitude of the dwarf secondary is 698 +/- 14 km/s and the orbital period of the system...
The Optical Spectroscopic Evolution of V1974 Cygni (Nova Cygni 1992) (2000)
Moro-Martin, A., Garnavich, P. M., Noriega-Crespo, A.
Optical observations of nova V1974 Cygni (Cygni 1992), spanning a 4 year period, have been used to study its spectroscopic evolution. The data cover a wavelength range from $\sim 3200 - 8000$ \AA and...
Resolving Gamma-Ray Burst 000301C with a Gravitational Microlens (2000)
Garnavich, P. M., Loeb, A., Stanek, K. Z.
The afterglow of the Gamma-Ray Burst (GRB) 000301C exhibited achromatic, short time-scale variability that is difficult to reconcile with the standard relativistic shock model. We interpret the...
Optical and Near Infrared Study of the Cepheus E outflow, a very low excitation object (2000)
Ayala, S., Noriega-Crespo, A., Garnavich, P. M., Curiel, S., Raga, A. C., Bohm, K. H., ...
We present images and spectra of the Cepheus E (Cep E) region at both optical and infrared wavelengths. Only the brightest region of the southern lobe of the Cep E outflow reveals optical emission,...
RJK Observations of the Optical Afterglow of GRB 991216 (2000)
Garnavich, P. M., Jha, S., Pahre, M. A., Stanek, K. Z., Kirshner, R. P., Garcia, M. R., ...
We present near-infrared and optical observations of the afterglow to the Gamma-Ray Burst (GRB) 991216 obtained with the F. L. Whipple Observatory 1.2-m telescope and the University of Hawaii 2.2-m...
BVRI Observations of the Optical Afterglow of GRB 990510 (1999)
Stanek, K. Z., Garnavich, P. M., Kaluzny, J., Pych, W., Thompson, I.
We present $BVRI$ observations of the optical counterpart to the Gamma-Ray Burst (GRB) 990510 obtained with the Las Campanas 1.0-m telescope between 15 and 48 hours after the burst. The temporal...
Supernova Limits on the Cosmic Equation of State (1998)
Garnavich, P. M., Jha, S., Challis, P., Clocchiatti, A., Diercks, A., Filippenko, A. V., ...
We use Type Ia supernovae studied by the High-Z Supernova Search Team to constrain the properties of an energy component which may have contributed to accelerating the cosmic expansion. We find that...
Distance to M31 With the HST and Hipparcos Red Clump Stars (1998)
Stanek, K. Z., Garnavich, P. M.
Following an approach by Paczy\'nski & Stanek we compare red clump stars with parallaxes known to better than 10% in the Hipparcos catalog with the red clump stars observed in three fields in M31...
Garnavich, P. M., Kirshner, R. P., Challis, P., Tonry, J., Gilliland, R. L., Smith, R. C., ...
We have coordinated Hubble Space Telescope photometry with ground-based discovery for three supernovae: two SN Ia near z~0.5 (SN 1997ce, SN 1997cj) and a third event at z=0.97 (SN 1997ck). The superb...