Castro-Tirado, A. J. ; Sagar, R. (2003) GRB 030227: the first multiwavelength afterglow of an INTEGRAL GRB Astronomy & Astrophysics, 411 (1). L315-L319. ISSN 0004-6361
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Official URL: http://www.aanda.org/index.php?option=com_article&...
Related URL: http://dx.doi.org/10.1051/0004-6361:20031393
Abstract
We present multiwavelength observations of a gamma-ray burst detected by INTEGRAL ( GRB 030227 ) between 5.3 hours and ~1.7 days after the event. Here we report the discovery of 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 αR=-0.95±0.16. The spectral index βopt/NIR yielded -1.25 ±0.14. These values may be explained by a relativistic expansion of a fireball (with p = 2.0) in the cooling regime. We also find evidence for inverse Compton scattering in X-rays.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to EDP Sciences. |
| Keywords: | Gamma Rays: Bursts; Techniques: Photometric; Cosmology: Observations |
| ID Code: | 91822 |
| Deposited On: | 24 May 2012 12:28 |
| Last Modified: | 24 May 2012 12:28 |
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