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LOTIS Upper Limits and the Prompt OT from GRB 990123
G. G. Williams, D. H. Hartmann, H. S. Park +14
GRB 990123 established the existence of prompt optical emission from gamma-ray bursts (GRBs). The Livermore Optical Transient Imaging System (LOTIS) has been conducting a fully aut…
Statistical properties of SGR 1900+14 bursts
Ersin Gogus, Peter M. Woods, Chryssa Kouveliotou +4
We study the statistics of soft gamma repeater (SGR) bursts, using a data base of 187 events detected with BATSE and 837 events detected with RXTE PCA, all from SGR 1900+14 during…
Hard Burst Emission from the Soft Gamma Repeater SGR 1900+14
Peter M. Woods, Chryssa Kouveliotou, Jan van Paradijs +7
We present evidence for burst emission from SGR 1900+14 with a power-law high energy spectrum extending beyond 500 keV. Unlike previous detections of high energy photons during bur…
VLT observations of GRB 990510 and its environment
K. Beuermann, F. V. Hessman, K. Reinsch +10
We present BVRI photometry and spectrophotometry of GRB990510 obtained with the ESO VLT/Antu telescope during the late decline phase. Between days 8 and 29 after the burst, the aft…
Evidence for an Early High-Energy Afterglow Observed with BATSE from GRB980923
T. W. Giblin, J. van Paradijs, C. Kouveliotou +5
In this Letter, we present the first evidence in the BATSE data for a prompt high-energy (25-300 keV) afterglow component from a gamma-ray burst (GRB), GRB980923. The event consist…
Physical Mechanisms for the Variable Spin-down of SGR 1900+14
C. Thompson, R. C. Duncan, P. M. Woods +3
We consider the physical implications of the rapid spindown of Soft Gamma Repeater 1900+14, and of the apparent "braking glitch", ΔP/P = l x 10^-4, that was concurrent with the Aug…