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

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

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..727..491c&link_type=abstract

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

Computer Science

Gamma-Ray Sources, Gamma-Ray Bursts, X-Ray Sources, X-Ray Bursts

Scientific paper

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.

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