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Discovery of the Optical Transient of the Gamma Ray Burst 990308
Bradley E. Schaefer, J. A. Snyder, J. Hernandez +53
The optical transient of the faint Gamma Ray Burst 990308 was detected by the QUEST camera on the Venezuelan 1-m Schmidt telescope starting 3.28 hours after the burst. Our photomet…
Average Emissivity Curve of BATSE Gamma-Ray Bursts with Different Intensities
I. G. Mitrofanov, M. L. Litvak, M. S. Briggs +4
Six intensity groups with ~150 BATSE gamma-ray bursts each are compared using average emissivity curves. Time-stretch factors for each of the dimmer groups are estimated with respe…
Average Cosmological Invariant Parameters of Cosmic Gamma Ray Burst
I. G. Mitrofanov, D. S. Anfimov, M. L. Litvak +5
Average cosmological invariant parameters (ACIPs) are calculated for six groups of BATSE cosmic gamma-ray bursts selected by their peak fluxes on the 1.024 s time scale. The ACIPs…
A ROSAT Deep Survey of Four Small Gamma-Ray Burst Error Boxes
K. Hurley, P. Li, M. Boer +11
We have used the ROSAT High Resolution Imager to search for quiescent X-ray counterparts to four gamma-ray bursts which were localized to small (< 10 sq. arcmin.) error boxes with…
The Fourth BATSE Gamma-Ray Burst Catalog (Revised)
W. S. Paciesas, C. A. Meegan, G. N. Pendleton +15
The Burst and Transient Source Experiment (BATSE) on the Compton Gamma Ray Observatory (CGRO) has triggered on 1637 cosmic gamma-ray bursts between 1991 April 19 and 1996 August 29…
LOTIS Search for Early Time Optical Afterglows: GRB 971227
G. G. Williams, H. S. Park, E. Ables +15
We report on the very early time search for an optical afterglow from GRB 971227 with the Livermore Optical Transient Imaging System (LOTIS). LOTIS began imaging the `Original' BAT…