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The Astrophysical Journal Letters


The Astrophysical Journal Letters Volume 735 Number 1

M. Sparre et al. 2011 ApJ 735 L24 doi:10.1088/2041-8205/735/1/L24

SPECTROSCOPIC EVIDENCE FOR SN 2010ma ASSOCIATED WITH GRB 101219B*

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M. Sparre1, J. Sollerman2, J. P. U. Fynbo1, D. Malesani1, P. Goldoni3,4, A. de Ugarte Postigo1, S. Covino5, V. D'Elia6,7, H. Flores8, F. Hammer8, J. Hjorth1, P. Jakobsson9, L. Kaper10, G. Leloudas1, A. J. Levan11, B. Milvang-Jensen1, S. Schulze9, G. Tagliaferri5, N. R. Tanvir12, D. J. Watson1, K. Wiersema12, and R. A. M. J. Wijers10

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Abstract References Cited By Metrics

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 = 4.2 × 1051 erg), a bright afterglow, and obeys the "Amati" relation, thus being fully consistent with the cosmological population of GRBs.


Footnote
*  Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere, Chile, under program 086.A-0073(B). Also based on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the Science and Technology Facilities Council (United Kingdom), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), Ministério da Ciência e Tecnologia (Brazil), and Ministerio de Ciencia, Tecnología e Innovacón Productiva (Argentina).
Keywords

gamma-ray burst: general; gamma-ray burst: individual (GRB 101219B); supernovae: individual (SN 2010ma)


Dates

Issue 1 (2011 July 1)

Received 2011 April 27, accepted for publication 2011 May 27

Published 2011 June 10

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