aaINTEGRAL21.pdf (300.41 kB)
Download fileGRB 030227: The first multiwavelength afterglow of an INTEGRAL GRB
journal contribution
posted on 2012-10-24, 09:21 authored by A. J. Castro-Tirado, J. Gorosabel, S. Guziy, D. Reverte, De Ugarte Postigo A, J. Vílhez, Castro Cerón JM, A. Fruchter, J. Rhoads, N. Tanvir, S. Mereghetti, A. Tiengo, J. Buckle, R. Sagar, S. B. Pandey, V. Mohan, N. Masetti, E. Palazzi, F. Mannucci, S. Feltzing, I. Lundstrom, H. Pedersen, J. Hjorth, B. L. Jensen, C. Riess, S. Trushkin, N. Lund, S. Brandt, Martínez Núñez S, V. Reglero, M. D. Pérez-Ramírez, S. Klose, J. Greiner, R. A. M. J. Wijers, Van den Heuvel E, L. Kaper, E. Rol, E. Pian, M. I. Andersen, J. P. U. Fynbo, C. Kouveliotou, P. M. VreeswijkWe 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.
History
Citation
Astronomy & Astrophysics, 2003, 411 (1)Version
- VoR (Version of Record)
