Possible detection of hard X-ray afterglows of short γ-ray bursts
Open Access
- 15 December 2001
- journal article
- research article
- Published by EDP Sciences in Astronomy & Astrophysics
- Vol. 379 (3) , L39-L43
- https://doi.org/10.1051/0004-6361:20011485
Abstract
We report the discovery of a transient and fading hard X-ray emission in the BATSE lightcurves of a sample of short γ-ray bursts. We have summed each of the four channel BATSE light curves of 76 short bursts to uncover the average overall temporal and spectral evolution of a possible transient signal following the prompt flux. We found an excess emission peaking ~30 s after the prompt one, detectable for ≈ 100 s. The soft power-law spectrum and the time-evolution of this transient signal suggest that it is produced by the deceleration of a relativistic expanding source, as predicted by the afterglow model.Keywords
All Related Versions
This publication has 25 references indexed in Scilit:
- A Search for Early Optical Emission from Short- and Long-Duration Gamma-Ray BurstsThe Astrophysical Journal, 2001
- The Distribution of Burst Energy and Shock Parameters for Gamma-Ray BurstsThe Astrophysical Journal, 2000
- Evidence for an Early High-Energy Afterglow Observed with BATSE from GRB 980923The Astrophysical Journal, 1999
- Observation of contemporaneous optical radiation from a γ-ray burstNature, 1999
- The radio afterglow from the γ-ray burst of 8 May 1997Nature, 1997
- Discovery of an X-ray afterglow associated with the γ-ray burst of 28 February 1997Nature, 1997
- BeppoSAX, the wide band mission for X-ray astronomyAstronomy and Astrophysics Supplement Series, 1997
- Identification of two classes of gamma-ray burstsThe Astrophysical Journal, 1993
- Nucleosynthesis, neutrino bursts and γ-rays from coalescing neutron starsNature, 1989
- Observations of Gamma-Ray Bursts of Cosmic OriginThe Astrophysical Journal, 1973