SPECTROSCOPIC EVIDENCE FOR SN 2010ma ASSOCIATED WITH GRB 101219B
2011 (English)In: The Astrophysical Journal Letters, ISSN 2041-8205, Vol. 735, no 1, L24- p.Article in journal (Refereed) Published
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.
gamma-ray burst: general, gamma-ray burst: individual (GRB 101219B), supernovae: individual (SN 2010ma)
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:su:diva-67008DOI: 10.1088/2041-8205/735/1/L24ISI: 000293137900024OAI: oai:DiVA.org:su-67008DiVA: diva2:470014
authorCount :222011-12-282011-12-222011-12-28Bibliographically approved