| Authors | A.J. Castro-Tirado, J. Gorosabel, S. Guziy, D. Reverte, J.M. Castro Ceron, A. de Ugarte Postigo, N. Tanvir, S. Mereghetti, A. Tiengo, J. Buckle, R. Sagar, S.B. Pandey, V. Mohan, N. Masetti, F. Manucci, S. Feltzing, I. Lundstrom, H. Pedersen, C. Riess, S. Trushkin, J. Vilchez, N. Lund, S. Brandt, S. Martinez Nu?ez, V. Reglero, M.D. Perez-Ramirez, S. Klose, J. Greiner, J. Hjorth, L. Kaper, E. Pian, E. Palazzi, M.I. Andersen, A. Fruchter, J.U. Fynbo, B.L. Jensen, C. Kouveliotou, J. Rhoads, E. Rol, P.M. Vreeswijk, R.A.M.J. Wijers, E.P.J. van den Heuvel | | Title | GRB 030227: The first multiwavelength afterglow of an INTEGRAL GRB |
| Journal | Astronomy and Astrophysics |
| Volume | 411 |
| Year | 2003 |
| Pages | L315-L319 |
| ISSN | 00046361 |
| Faculty | Faculty of Science |
| Institute/dept. | FNWI: Astronomical Institute Anton Pannekoek (IAP) |
| Keywords | Gamma ray bursts; Photometric techniques |
| 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 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.
Based on observations with INTEGRAL, an ESA project with instruments and science data centre funded by ESA member states (especially the PI countries: Denmark, France, Germany, Italy, Switzerland, Spain), Czech Republic and Poland, and with the participation of Russia and the USA. Also partially based on observations collected by the Gamma-Ray Burst Collaboration at ESO (GRACE) at the European Southern Observatory, Chile (ESO Large Programme 165.H-0464). |
| Note | © EDP Sciences 2003 |
| Document type | Article |
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