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| HAL : hal-00390588, version 1 |
| arXiv : 0904.4786 |
| Code Bibliographique ADS : 2009ApJ...697L..18K |
| DOI : 10.1088/0004-637X/697/1/L18 |
| Fiche détaillée |  Récupérer au format |
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| The Astrophysical Journal / The Astrophysical Journal Letters; Astrophysical Journal Letters to the Editor 697 (2009) L18-L21 |
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| Observation of Correlated Optical and Gamma Emissions from GRB 081126 |
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| A. Klotz 1, 2B. Gendre 3 |
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| (05/2009) |
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| We present an analysis of time-resolved optical emissions observed from the gamma-ray burst GRB 081126 during the prompt phase. The analysis employed time-resolved photometry using optical data obtained by the TAROT telescope, using BAT data from the Swift spacecraft, and time-resolved spectroscopy at high energies from the GBM instrument onboard the Fermi spacecraft. The optical emission of GRB 081126 is found to be compatible with the second gamma emission pulse shifted by a positive time lag of 8.4 ± 3.9 s. This is the first well-resolved observation of a time lag between optical and gamma emissions during a gamma-ray burst. Our observations could potentially provide new constraints on the fireball model for gamma-ray burst early emissions. Furthermore, observations of time lags between optical and gamma ray photons provides an exciting opportunity to constrain quantum gravity theories. |
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| 1 : | Centre d'étude spatiale des rayonnements (CESR) |
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CNRS : UMR5187 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| 2 : | Observatoire de Haute-Provence (OHP) |
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CNRS : USR2207 – INSU – Université de Provence - Aix-Marseille I |
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| 3 : | Laboratoire d'Astrophysique de Marseille (LAM) |
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CNRS : UMR6110 – INSU – Université de Provence - Aix-Marseille I |
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| 4 : | Laboratoire Astrophysique de Toulouse-Tarbes (LATT) |
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CNRS : UMR5572 – INSU – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III |
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| 5 : | School of Physics, University of Western Australia |
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University of Western Australia |
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| Domaine | : | Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique |
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| gamma rays: bursts |
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| Lien vers le texte intégral : |
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| http://fr.arXiv.org/abs/0904.4786 |
| hal-00390588, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00390588 | |
| oai:hal.archives-ouvertes.fr:hal-00390588 | |
| Contributeur : Dominique Lullier | |
| Soumis le : Mardi 2 Juin 2009, 14:30:37 | |
| Dernière modification le : Mardi 2 Juin 2009, 14:30:37 | |
