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Epeak estimator for Gamma-Ray Bursts Observed by the Swift Burst Alert Telescope
T. Sakamoto, G. Sato, L. Barbier +13
We report a correlation based on a spectral simulation study of the prompt emission spectra of gamma-ray bursts (GRBs) detected by the Swift Burst Alert Telescope (BAT). The correl…
Intrinsic properties of a complete sample of HETE-2 gamma-ray bursts. A measure of the GRB rate in the Local Universe
A. Pélangeon, J. -L. Atteia, Y. E. Nakagawa +32
Aims: Taking advantage of the forthcoming Catalog of the HETE-2 mission, the aim of this paper is to evaluate the main properties of HETE-2 GRBs - the E_peak, the T_90 and the E_is…
A Line-Of-Sight Galaxy Cluster Collision: Simulated X-Ray Observations
J. A. Zuhone, P. M. Ricker, D. Q. Lamb +1
Several lines of evidence have suggested that the the galaxy cluster Cl~0024+17, an apparently relaxed system, is actually a collision of two clusters, the interaction occurring al…
Study of the Detonation Phase in the Gravitationally Confined Detonation Model of Type Ia Supernovae
Casey A. Meakin, Ivo Seitenzahl, Dean Townsley +3
We study the gravitationally confined detonation (GCD) model of Type Ia supernovae through the detonation phase and into homologous expansion. In the GCD model, a detonation is tri…
Multiple Component Analysis of Time Resolved Spectra of GRB041006: A Clue to the Nature of Underlying Soft Component of GRBs
Yuji Shirasaki, Atsumasa Yoshida, Nobuyuki Kawai +30
GRB 041006 was detected by HETE-2 at 12:18:08 UT on 06 October 2004. This GRB displays a soft X-ray emission, a precursor before the onset of the main event, and also a soft X-ray…
Three-Dimensional Simulations of the Deflagration Phase of the Gravitationally Confined Detonation Model of Type Ia Supernovae
G C Jordan, R T Fisher, D M Townsley +5
We report the results of a series of three-dimensional (3-D) simulations of the deflagration phase of the gravitationally confined detonation mechanism for Type Ia supernovae. In t…
Capturing the Fire: Flame Energetics and Neutronizaton for Type Ia Supernova Simulations
A. C. Calder, D. M. Townsley, I. R. Seitenzahl +6
We develop and calibrate a realistic model flame for hydrodynamical simulations of deflagrations in white dwarf (Type Ia) supernovae. Our flame model builds on the advection-diffus…
Two Additions to the New Class of Low Accretion-Rate Magnetic Binaries
Gary D. Schmidt, Paula Szkody, Arne Henden +4
Two new magnetic white dwarf accretion binaries with extremely low mass-transfer rates have been discovered in the course of the Sloan Digital Sky Survey. Measured magnetic fields…
HETE-2 Localizations and Observations of Four Short Gamma-Ray Bursts: GRBs 010326B, 040802, 051211 and 060121
T. Q. Donaghy, D. Q. Lamb, T. Sakamoto +34
Here we report the localizations and properties of four short-duration GRBs localized by the High Energy Transient Explorer 2 satellite (HETE-2): GRBs 010326B, 040802, 051211 and 0…
GRB 060121: Implications of a Short/Intermediate Duration Gamma-Ray Burst at High Redshift
A. de Ugarte Postigo, A. J. Castro-Tirado, S. Guziy +23
Since the discovery of the first short-hard gamma-ray burst afterglows in 2005, the handful of observed events have been found to be embedded in nearby (z < 1), bright underlying g…
An Optically Dark GRB Observed by HETE-2: GRB 051022
Yujin E. Nakagawa, Atsumasa Yoshida, Satoshi Sugita +33
GRB 051022 was detected at 13:07:58 on 22 October 2005 by HETE-2. The location of GRB 051022 was determined immediately by the flight localization system. This burst contains multi…
A Study of Compact Object Mergers as Short Gamma-ray Burst Progenitors
Krzysztof Belczynski, Rosalba Perna, Tomasz Bulik +3
We present a theoretical study of double compact objects as potential short/hard gamma-ray burst (GRB) progenitors. An updated population synthesis code StarTrack is used to calcul…
Discovery of the short gamma-ray burst GRB 050709
J. S. Villasenor, D. Q. Lamb, G. R. Ricker +30
Gamma-Ray Bursts (GRBs) fall into two classes: short-hard and long-soft bursts. The latter are now known to have X-ray and optical afterglows, to occur at cosmological distances in…
The Fourth Data Release of the Sloan Digital Sky Survey
J. K. Adelman-McCarthy et al.
This paper describes the fourth data release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through June 2004. The data release includes five-band…
A Gamma-Ray Burst Mission to Investigate the Properties of Dark Energy
D. Q. Lamb, G. R. Ricker, D. Lazzati +26
[Abridged] Very recently, relations between the peak energy of Gamma-Ray Burst burst spectra, the isotropic-equivalent energy of the burst, and the radiated energy of the burst hav…
Gamma-Ray Burst Jet Profiles And Their Signatures
C. Graziani, D. Q. Lamb, T. Q. Donaghy
HETE-II and BeppoSAX have produced a sample of GRBs and XRFs with known redshifts and . This sample provides four important empirical constraints on the nature of the sourc…
HETE-2 Observation of two gamma-ray bursts at z > 3
J. -L. Atteia, N. Kawai, R. Vanderspek +36
GRB 020124 and GRB 030323 constitute half the sample of gamma-ray bursts with a measured redshift greater than 3. This paper presents the temporal and spectral properties of these…
The Third Data Release of the Sloan Digital Sky Survey
K. Abazajian et al.
This paper describes the Third Data Release of the Sloan Digital Sky Survey (SDSS). This release, containing data taken up through June 2003, includes imaging data in five bands ov…
High Energy Observations of XRF 030723: Evidence for an Off-axis Gamma-Ray Burst?
N. R. Butler, T. Sakamoto, M. Suzuki +34
We report High Energy Transient Explorer 2 (HETE-2) Wide Field X-ray Monitor/French Gamma Telescope observations of XRF030723 along with observations of the XRF afterglow made usin…
Discovery of New Ultracool White Dwarfs in the Sloan Digital Sky Survey
Evalyn Gates, Geza Gyuk, Hugh C. Harris +14
We report the discovery of five very cool white dwarfs in the Sloan Digital Sky Survey (SDSS). Four are ultracool, exhibiting strong collision induced absorption (CIA) from molecul…
Type Ia Supernovae: An Asymmetric Deflagration Model
A. C. Calder, T. Plewa, N. Vladimirova +2
We present the first high-resolution three-dimensional simulations of the deflagration phase of Type Ia supernovae that treat the entire massive white dwarf. We report the results…
A Catalog of Spectroscopically Identified White Dwarf Stars in the First Data Release of the Sloan Digital Sky Survey
S. J. Kleinman, Hugh C. Harris, Daniel J. Eisenstein +23
We present the full spectroscopic white dwarf and hot subdwarf sample from the SDSS first data release, DR1. We find 2551 white dwarf stars of various types, 240 hot subdwarf stars…
Previously Claimed(/Unclaimed) X-ray Emission Lines in High Resolution Afterglow Spectra
N. Butler, A. Dullighan, P. Ford +5
We review the significance determination for emission lines in the Chandra HETGS spectrum for GRB020813, and we report on a search for additional lines in high resolution Chandra s…
Optical and X-ray Observations of the Afterglow to XRF030723
N. Butler, A. Dullighan, P. Ford +6
The X-ray-flash XRF030723 was detected by the HETE satellite and rapidly disseminated, allowing for an optical transient to be detected ~1 day after the burst. We discuss observati…