GRB 030227: the first multiwavelength afterglow of an INTEGRAL GRB

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dc.creatorCastro-Tirado, A. J.
dc.creatorGorosabel, J.
dc.creatorGuziy, S.
dc.creatorReverte, D.
dc.creatorCerón, J. M. Castro
dc.creatorPostigo, A. de Ugarte
dc.creatorTanvir, N.
dc.creatorMereghetti, S.
dc.creatorTiengo, A.
dc.creatorBuckle, J.
dc.creatorSagar, R.
dc.creatorPandey, S. B.
dc.creatorMohan, V.
dc.creatorMasetti, N.
dc.creatorMannucci, F.
dc.creatorFeltzing, S.
dc.creatorLundstrom, I.
dc.creatorPedersen, H.
dc.creatorRiess, C.
dc.creatorTrushkin, S.
dc.creatorVilchez, J.
dc.creatorLund, N.
dc.creatorBrandt, S.
dc.creatorNunez, S. Martinez
dc.creatorReglero, V.
dc.creatorPerez-Ramirez, M. D.
dc.creatorKlose, S.
dc.creatorGreiner, J.
dc.creatorHjorth, J.
dc.creatorKaper, L.
dc.creatorPian, E.
dc.creatorPalazzi, E.
dc.creatorAndersen, M. I.
dc.creatorFruchter, A.
dc.creatorFynbo, J. P. U.
dc.creatorJensen, B. L.
dc.creatorKouveliotou, C.
dc.creatorRhoads, J.
dc.creatorRol, E.
dc.creatorVreeswijk, P. M.
dc.creatorWijers, R. A. M. J.
dc.creatorHeuvel, E. van den
dc.date2003-09-29
dc.date.accessioned2026-07-07T12:00:57Z
dc.date.available2026-07-07T12:00:57Z
dc.descriptionWe 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.
dc.description5 pages, 5 figures, accepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0309804
dc.identifierhttp://arxiv.org/abs/astro-ph/0309804
dc.identifierAstron.Astrophys.411:L315-L319,2003
dc.identifierdoi:10.1051/0004-6361:20031393
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206954
dc.subjectAstrophysics
dc.titleGRB 030227: the first multiwavelength afterglow of an INTEGRAL GRB
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