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Title: GRB 030227: The first multiwavelength afterglow of an INTEGRAL GRB
Authors: Castro-Tirado, A. J.
Gorosabel, J.
Guziy, S.
Reverte, D.
De Ugarte Postigo A
Vílhez, J.
Gorosabel, J.
Castro Cerón JM
Fruchter, A.
Rhoads, J.
Tanvir, N.
Mereghetti, S.
Tiengo, A.
Buckle, J.
Sagar, R.
Pandey, S. B.
Mohan, V.
Masetti, N.
Palazzi, E.
Mannucci, F.
Feltzing, S.
Lundstrom, I.
Pedersen, H.
Hjorth, J.
Jensen, B. L.
Riess, C.
Trushkin, S.
Lund, N.
Brandt, S.
Martínez Núñez S
Reglero, V.
Pérez-Ramírez, M. D.
Klose, S.
Greiner, J.
Wijers, R. A. M. J.
Van den Heuvel E
Kaper, L.
Rol, E.
Pian, E.
Andersen, M. I.
Fynbo, J. P. U.
Kouveliotou, C.
Vreeswijk, P. M.
First Published: Nov-2003
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy & Astrophysics, 2003, 411 (1)
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 ( $R\sim 23$). This OA was seen to decline following a power law decay with index $\alpha_{R} = -0.95 \pm 0.16$. The spectral index $\beta_\mathrm{opt/NIR}$ yielded $-1.25 \pm 0.14$. 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.
DOI Link: 10.1051/0004-6361:20031393
ISSN: 0004-6361
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2003 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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