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GRB 030227 : The first multiwavelength afterglow of an INTEGRAL GRB

Castro-Tirado, A. J.; Gorosabel, J.; Guziy, S.; Reverte, D.; Castro Cerón, J. M.; de Ugarte Postigo, A.; Tanvir, N.; Mereghetti, S.; Tiengo, A. and Buckle, J., et al. (2003) In Astronomy & Astrophysics 411(1). p.315-319
Abstract
We present multiwavelength observations of a gamma-ray burst detected byINTEGRAL (GRB 030227) between 5.3 hours and ~ 1.7days after the event. Here we report the discovery of a dim opticalafterglow (OA) that would not have been detected by many previoussearches due to its faintess (R ~ 23). This OA was seen to declinefollowing a power law decay with index alpha R = -0.95 +/-0.16. The spectral index beta_ opt/NIR yielded -1.25 +/- 0.14. Thesevalues may be explained by a relativistic expansion of a fireball (withp = 2.0) in the cooling regime. We also find evidence for inverseCompton scattering in X-rays.Based on observations with INTEGRAL, an ESA project with instruments andscience data centre funded by ESA member states (especially the... (More)
We present multiwavelength observations of a gamma-ray burst detected byINTEGRAL (GRB 030227) between 5.3 hours and ~ 1.7days after the event. Here we report the discovery of a dim opticalafterglow (OA) that would not have been detected by many previoussearches due to its faintess (R ~ 23). This OA was seen to declinefollowing a power law decay with index alpha R = -0.95 +/-0.16. The spectral index beta_ opt/NIR yielded -1.25 +/- 0.14. Thesevalues may be explained by a relativistic expansion of a fireball (withp = 2.0) in the cooling regime. We also find evidence for inverseCompton scattering in X-rays.Based on observations with INTEGRAL, an ESA project with instruments andscience data centre funded by ESA member states (especially the PIcountries: Denmark, France, Germany, Italy, Switzerland, Spain), CzechRepublic and Poland, and with the participation of Russia and the USA.Also partially based on observations collected by the Gamma-Ray BurstCollaboration at ESO (GRACE) at the European Southern Observatory, Chile(ESO Large Programme 165.H-0464). (Less)
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@article{a629c941-2fa3-4964-94b2-a2a899254396,
  abstract     = {We present multiwavelength observations of a gamma-ray burst detected byINTEGRAL (GRB 030227) between 5.3 hours and ~ 1.7days after the event. Here we report the discovery of a dim opticalafterglow (OA) that would not have been detected by many previoussearches due to its faintess (R ~ 23). This OA was seen to declinefollowing a power law decay with index alpha R = -0.95 +/-0.16. The spectral index beta_ opt/NIR yielded -1.25 +/- 0.14. Thesevalues may be explained by a relativistic expansion of a fireball (withp = 2.0) in the cooling regime. We also find evidence for inverseCompton scattering in X-rays.Based on observations with INTEGRAL, an ESA project with instruments andscience data centre funded by ESA member states (especially the PIcountries: Denmark, France, Germany, Italy, Switzerland, Spain), CzechRepublic and Poland, and with the participation of Russia and the USA.Also partially based on observations collected by the Gamma-Ray BurstCollaboration at ESO (GRACE) at the European Southern Observatory, Chile(ESO Large Programme 165.H-0464).},
  author       = {Castro-Tirado, A. J. and Gorosabel, J. and Guziy, S. and Reverte, D. and Castro Cerón, J. M. and de Ugarte Postigo, A. and Tanvir, N. and Mereghetti, S. and Tiengo, A. and Buckle, J. and Sagar, R. and Pandey, S. B. and Mohan, V. and Masetti, N. and Mannucci, F. and Feltzing, Sofia and Lundström, Ingemar and Pedersen, H. and Riess, C. and Trushkin, S. and Vílchez, J. and Lund, N. and Brandt, S. and Martínez Núñez, S. and Reglero, V. and Pérez-Ramírez, M. D. and Klose, S. and Greiner, J. and Hjorth, J. and Kaper, L. and Pian, E. and Palazzi, E. and Andersen, M. I. and Fruchter, A. and Fynbo, J. P. U. and Jensen, B. L. and Kouveliotou, C. and Rhoads, J. and Rol, E. and Vreeswijk, P. M. and Wijers, R. A. M. J. and van den Heuvel, E.},
  issn         = {0004-6361},
  keyword      = {gamma rays: bursts,techniques: photometric,cosmology: observations},
  language     = {eng},
  number       = {1},
  pages        = {315--319},
  publisher    = {EDP Sciences},
  series       = {Astronomy & Astrophysics},
  title        = {GRB 030227 : The first multiwavelength afterglow of an INTEGRAL GRB},
  url          = {http://dx.doi.org/10.1051/0004-6361:20031393},
  volume       = {411},
  year         = {2003},
}