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| HAL : hal-00685018, version 1 |
| arXiv : 1110.0734 |
| Code Bibliographique ADS : 2012ApJ...748...59G |
| DOI : 10.1088/0004-637X/748/1/59 |
| Fiche détaillée |  Récupérer au format |
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| Astrophysical Journal 748, 1 (2012) article id. 59 |
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| GRB 110205A: Anatomy of a long gamma-ray burst |
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| Bruce Gendre 1Jean-Luc Atteia 2 |
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| (03/2012) |
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| The Swift burst GRB 110205A was a very bright burst visible in the Northern hemisphere. GRB 110205A was intrinsically long and very energetic and it occurred in a low-density interstellar medium environment, leading to delayed afterglow emission and a clear temporal separation of the main emitting components: prompt emission, reverse shock, and forward shock. Our observations show several remarkable features of GRB 110205A : the detection of prompt optical emission strongly correlated with the BAT light curve, with no temporal lag between the two ; the absence of correlation of the X-ray emission compared to the optical and high energy gamma-ray ones during the prompt phase ; and a large optical re-brightening after the end of the prompt phase, that we interpret as a signature of the reverse shock. Beyond the pedagogical value offered by the excellent multi-wavelength coverage of a GRB with temporally separated radiating components, we discuss several questions raised by our observations: the nature of the prompt optical emission and the spectral evolution of the prompt emission at high-energies (from 0.5 keV to 150 keV) ; the origin of an X-ray flare at the beginning of the forward shock; and the modeling of the afterglow, including the reverse shock, in the framework of the classical fireball model. |
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| 1 : | ASI Science Data Center (ASDC) |
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Italian Space Agency |
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| 2 : | Institut de recherche en astrophysique et planétologie (IRAP) |
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CNRS : UMR5277 – Université Paul Sabatier [UPS] - Toulouse III – Observatoire Midi-Pyrénées |
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| 3 : | Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux (ARTEMIS) |
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Université Nice Sophia Antipolis [UNS] – CNRS : UMR7250 – Observatoire de la Côte d'Azur – INSU |
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| 4 : | Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE) |
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CNRS : UMR8028 – INSU – Observatoire de Paris – Université Pierre et Marie Curie (UPMC) - Paris VI – Université Lille I - Sciences et technologies |
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| 5 : | Observatoire Chante-Perdrix |
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Observatoire Chante-Perdrix |
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| 6 : | School of Physics, University of Western Australia |
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University of Western Australia |
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| 7 : | Observatoire de Haute-Provence (OHP) |
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CNRS : USR2207 – INSU – Université de Provence - Aix-Marseille I |
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| Domaine | : | Physique/Astrophysique/Phénomènes cosmiques de haute energie Planète et Univers/Astrophysique/Phénomènes cosmiques de haute energie |
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| gamma-ray burst: individual: GRB 110205A |
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| Lien vers le texte intégral : |
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| http://fr.arXiv.org/abs/1110.0734 |
| hal-00685018, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00685018 | |
| oai:hal.archives-ouvertes.fr:hal-00685018 | |
| Contributeur : Camille Baron | |
| Soumis le : Mardi 3 Avril 2012, 17:07:11 | |
| Dernière modification le : Mardi 3 Avril 2012, 17:07:11 | |
