GRANAT/SIGMA observation of GRB 920723 soft gamma-ray afterglow

Authors
Burenin, RA Vikhlinin, AA Terekhov, OV Tkachenko, AY Sazonov, SY Gilfanov, MR Churazov, EM Sunyaev, RA Goldoni, P Claret, A Goldwurm, A Paul, J Roques, JP Jourdain, E Vedrenne, G Mandrou, P
Citation
Ra. Burenin et al., GRANAT/SIGMA observation of GRB 920723 soft gamma-ray afterglow, ASTR AST SS, 138(3), 1999, pp. 443-444
Citations number
9
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES
ISSN journal
03650138 → ACNP
Volume
138
Issue
3
Year of publication
1999
Pages
443 - 444
Database
ISI
SICI code
0365-0138(199909)138:3<443:GOOG9S>2.0.ZU;2-V
Abstract
We present GRANAT/SIGMA observations of the soft gamma-ray afterglow immedi ately after the bright GRB 920723. After similar to 6s, the burst light cur ve makes a smooth transition into an afterglow where flux decays as t(-0.7) for at least similar to 1000 s. At least similar to 20% of main burst ener gy is emitted in the afterglow. The hardness of the afterglow spectrum corr esponds to the power law spectral index approximate to 1, which is signific antly softer than the main burst.