HST/STIS Imaging of the Host Galaxy of GRB980425/SN1998bw

J. U. Fynbo (1) , S. Holland (2) , M. I. Andersen (3) , B. Thomsen (2) , J. Hjorth (1) , G. Bjornsson (4) , A. O. Jaunsen (5) , P. Natarajan (6

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7) N. Tanvir (8) ((1)University of Copenhagen (2) University of Aarhus (3) University of Oulu (4) University of Iceland (5) Univsersity of Oslo (6) Cambridge University (7) Yale University (8) University of Hertfordshire)

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keywords galaxysupernovahostobjectsn1998bwstarstisactively

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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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HST/STIS Imaging of the Host Galaxy of GRB980425/SN1998bw

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