Preprint article · Journal article
GRB 030227: The first multiwavelength afterglow of an INTEGRAL GRB
We present multiwavelength observations of a gamma-ray burst detected by INTEGRAL (GRB 030227) between 5.3 hours and similar to1.7 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 similar to 23).
This OA was seen to decline following a power law decay with index alpha(R) = - 0.95 +/- 0.16. The spectral index beta(opt/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.
Language: | English |
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Publisher: | EDP Sciences |
Year: | 2003 |
Pages: | L315-L319 |
ISSN: | 14320746 and 00046361 |
Types: | Preprint article and Journal article |
DOI: | 10.1051/0004-6361:20031393 |
ORCIDs: | 0000-0002-4571-2306 , 0000-0002-8109-033X , 0000-0002-8149-8298 , 0000-0002-0906-9771 , Lund, Niels and Brandt, Søren |
Cosmology: observations Gamma rays: bursts Techniques: photometric astro-ph