The spatially resolved host of GRB 060505 and implications for the nature of the progenitor

Details The spatially resolved host of GRB 060505 and implications for the nature of the progenitor The spatially resolved host of GRB 060505 and implications for the nature of the progenitor

2007-06-05

arxiv.org/abs/0706.0674v1

Astronomy and Astrophysics

Astrophysics

5 pages, 1 figure. Proceedings of the Amsterdam conference, 10 years of GRB afterglows, March 19-23, 2007, to appear in New As

Scientific paper

We present a study of the host galaxy of the Gamma-Ray Burst (GRB) of May 5 2006 (GRB 060505). The host is spatially resolved in both imaging data and in a long slit spectrum including the GRB site. We find the galaxy to be a Sbc spiral, which is unusual for a long GRB host galaxy. The site of the GRB is considerably different from the rest of the galaxy with intense star formation, low metallicity and a young age. This suggest a massive stellar progenitor rather than a merger of compact objects which has been suggested based on the the relatively short duration of T_90=4s for the prompt emission.

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