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SPECTROSCOPIC EVIDENCE FOR SN 2010ma ASSOCIATED WITH GRB 101219B
Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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2011 (English)In: The Astrophysical Journal Letters, ISSN 2041-8205, Vol. 735, no 1, L24- p.Article in journal (Refereed) Published
Abstract [en]

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 Very Large Telescope. 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) = 4.2x10(51) erg), a bright afterglow, and obeys the Amati relation, thus being fully consistent with the cosmological population of GRBs.

Place, publisher, year, edition, pages
2011. Vol. 735, no 1, L24- p.
Keyword [en]
gamma-ray burst: general, gamma-ray burst: individual (GRB 101219B), supernovae: individual (SN 2010ma)
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-67008DOI: 10.1088/2041-8205/735/1/L24ISI: 000293137900024OAI: oai:DiVA.org:su-67008DiVA: diva2:470014
Note
authorCount :22Available from: 2011-12-28 Created: 2011-12-22 Last updated: 2011-12-28Bibliographically approved

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