HST/STIS Imaging of the Host Galaxy of GRB980425/SN1998bw
J. U. Fynbo, S. Holland, M. I. Andersen, B. Thomsen, J. Hjorth, G. Bjornsson, A. O. Jaunsen, P. Natarajan, N. Tanvir
Abstract
We present HST/STIS observations of ESO 184-G82, the host galaxy of the gamma-ray burst GRB 980425 associated with the peculiar Type Ic supernova SN1998bw. ESO 184-G82 is found to be an actively star forming SBc sub-luminous galaxy. We detect an object consistent with being a point source within the astrometric uncertainty of 0.018 arcseconds of the position of the supernova. The object is located inside a star-forming region and is at least one magnitude brighter than expected for the supernova based on a simple radioactive decay model. This implies either a significant flattening of the light curve or a contribution from an underlying star cluster.
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