Discovery of the nearby long, soft GRB 100316D with an associated supernova
2011 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 411, no 4, 2792-2803 p.Article in journal (Refereed) Published
We report the Swift discovery of the nearby long, soft gamma-ray burst GRB 100316D, and the subsequent unveiling of its low-redshift host galaxy and associated supernova. We derive the redshift of the event to be z = 0.0591 +/- 0.0001 and provide accurate astrometry for the gamma-ray burst (GRB) supernova (SN). We study the extremely unusual prompt emission with time-resolved gamma-ray to X-ray spectroscopy and find that the spectrum is best modelled with a thermal component in addition to a synchrotron emission component with a low peak energy. The X-ray light curve has a remarkably shallow decay out to at least 800 s. The host is a bright, blue galaxy with a highly disturbed morphology and we use Gemini-South, Very Large Telescope and Hubble Space Telescope observations to measure some of the basic host galaxy properties. We compare and contrast the X-ray emission and host galaxy of GRB 100316D to a subsample of GRB-SNe. GRB 100316D is unlike the majority of GRB-SNe in its X-ray evolution, but resembles rather GRB 060218, and we find that these two events have remarkably similar high energy prompt emission properties. Comparison of the host galaxies of GRB-SNe demonstrates, however, that there is a great diversity in the environments in which GRB-SNe can be found. GRB 100316D is an important addition to the currently sparse sample of spectroscopically confirmed GRB-SNe, from which a better understanding of long GRB progenitors and the GRB-SN connection can be gleaned.
Place, publisher, year, edition, pages
2011. Vol. 411, no 4, 2792-2803 p.
gamma-ray burst: individual: GRB 100316D, supernovae: individual: SN 2010bh
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:su:diva-67942DOI: 10.1111/j.1365-2966.2010.17879.xISI: 000287859200042OAI: oai:DiVA.org:su-67942DiVA: diva2:471615
authorCount :462012-01-022012-01-022012-01-02Bibliographically approved