The GRB 030227 Detected by INTEGRAL: Another Sign of Compton Scattering in X-rays

Bibcode
2004AIPC..727..491C
DOI
10.1063/1.1810894
Castro-Tirado, A. J.; Gorosabel, J.; Guziy, S.; Reverte, D.; Castro Cerón, J. M.; de Ugarte Postigo, A.; Tanvir, N.; Mereghetti, S.; Tiengo, A.; Pandey, S. B.; Masetti, N.; Pedersen, H.; Grace Collaboration
Bibliographical reference

GAMMA-RAY BURSTS: 30 YEARS OF DISCOVERY: Gamma-Ray Burst Symposium. AIP Conference Proceedings, Volume 727, pp. 491-496 (2004).

Advertised on:
9
2004
Number of authors
13
IAC number of authors
0
Citations
1
Refereed citations
1
Description
Multiwavelengthp observations of a GRB detected by INTEGRAL (GRB 030227) revealed a dim optical afterglow (OA) that would not have been detected by many previous searches due to its faintess (R~ 23). This OA was seen to decline following a power law decay with index α = -0.95 +/- 0.16. The spectral index β of the OA yields -1.32 +/- 0.15, with the intrinsec absorption consistent with zero. These values may be explained by a relativistic expansion of a fireball in an homogeneous medium. We also find evidence for inverse Compton scattering in X-rays. A possible break is detected at ~ 1.5 days.
Type
Non-refereed
Gamma-ray sources
Gamma-ray bursts
X-ray sources
X-ray bursts

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