158 articles – 1993 Notices  [english version]
 HAL : hal-00708863, version 1
 arXiv : 1105.0422
 Astrophysical Journal Letters 735 (2011) L24
 Spectroscopic evidence for SN 2010ma associated with GRB 101219B
 (07/2011)
 We report on the spectroscopic detection of supernova SN 2010ma associated with the long gamma-ray burst GRB 101219B. We observed the optical counterpart of the GRB on three nights with the X-shooter spectrograph at the VLT. From weak absorption lines, we measure a redshift of z = 0.55. The first epoch UV--near-infrared afterglow spectrum, taken 11.6 hr after the burst, is well fit by a power law consistent with the slope of the X-ray spectrum. The second and third epoch spectra (obtained 16.4 and 36.7 days after the burst), however, display clear bumps closely resembling those of the broad-lined type-Ic SN 1998bw if placed at z=0.55. Apart from demonstrating that spectroscopic SN signatures can be observed for GRBs at these large distances, our discovery makes a step forward in establishing a general connection between GRBs and SNe. In fact, unlike most previous unambiguous GRB-associated SNe, GRB 101219B has a large gamma-ray energy (E_iso = 4.2 x 10^{51} erg), a bright afterglow, and obeys the "Amati" relation, thus being fully consistent with the cosmological population of GRBs.
 équipe(s) de recherche : APC - AHE
 Domaine : Physique/Astrophysique/Phénomènes cosmiques de haute energiePlanète et Univers/Astrophysique/Phénomènes cosmiques de haute energie
 Mots Clés : Supernovae – individual – SN2010ma – Gamma-ray burst – GRB 101219B – general.
 Lien vers le texte intégral : http://fr.arXiv.org/abs/1105.0422
 hal-00708863, version 1 http://hal.archives-ouvertes.fr/hal-00708863 oai:hal.archives-ouvertes.fr:hal-00708863 Contributeur : Paolo Goldoni <> Soumis le : Samedi 16 Juin 2012, 08:55:22 Dernière modification le : Samedi 16 Juin 2012, 17:35:08