Optical observations of GRB 060218/SN 2006aj and its host galaxy

Details Optical observations of GRB 060218/SN 2006aj and its host galaxy Optical observations of GRB 060218/SN 2006aj and its host galaxy

2006-10-13

arxiv.org/abs/astro-ph/0610417v1

AIPConf.Proc.924:120-125,2007

Astronomy and Astrophysics

Astrophysics

To appear in conf. proc. of "The Multicoloured Landscape of Compact Objects and their Explosive Progenitors: Theory vs Observa

Scientific paper

10.1063/1.2774848

The supernova SN 2006aj associated with GRB 060218 is the second-closest GRB-SN observed to date ($z$=0.033) and is the clearest example of a SN associated with a Swift GRB with the earliest optical spectroscopy. Its optical data showed that this is the fastest evolving and among the least luminous GRB-SNe (70% as luminous as SN1998bw). However, its expansion velocity and a comparison with other stripped-envelope SNe suggest that SN2006aj is an intermediate object between Type Ic GRB-SNe and those not accompained by a GRB. High-resolution optical spectroscopy together with SDSS pre-burst observations revealed that the host galaxy of SN2006aj is a low-luminosity, metal-poor star-forming dwarf galaxy.

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