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GRB 030227: The first multiwavelength afterglow of an INTEGRAL GRB

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GRB 030227: The first multiwavelength afterglow of an INTEGRAL GRB

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Castro-Tirado, A.J.; Gorosabel, J.; Guziy, S.; Reverte, D.; Castro Cerón, J.M.; de Ugarte Postigo, A.; Tanvir, N.; Mereghetti, S.; Tiengo, A.; Buckle, J.; Sagar, R.; Pandey, S.B.; Mohan, V.; Masetti, N.; Mannucci, F.; Feltzing, S.; Lundstrom, I.; Pedersen, H.; Riess, C.; Trushkin, S.; Vílchez, J.; Lund, N.; Brandt, S.; Martinez Nuñez, Silvia; Reglero Velasco, Victor; Pérez-Ramírez, M.D.; Klose, S.; Greiner, J.; Hjorth, J.; Kaper, L.; Pian, E.; Palazzi, E.; Andersen, M.I.; Fruchter, A.; Fynbo, J.P.U.; Jensen, J.L.; Kouveliotou, C.; Rhoads, J.; Rol, E.; Vreeswijk, P.M.; Wijers, R. A. M. J.; van den Heuvel, E.
Este documento es un/a artículo publicado, creado en: 2003
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.

    CASTRO-TIRADO, A.J. et al. 2003, GRB 030227: The first multiwavelength afterglow of an INTEGRAL GRB, Astronomy and Astrophysics, vol. 411, no. 1, p. L315–L319
http://www.aanda.org/articles/aa/pdf/2003/43/aaINTEGRAL21.pdf
distribuido bajo licencia Creative Commons de Reconocimiento-NoComercial 3.0 No adaptada

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