{
  "bibcode": "2000GCN...704....1H",
  "body": "Stephen Holland, Johan Fynbo, Bjarne Thomsen (University of Aarhus),\nMichael Andersen (University of Oulu),\nGunnlaugur Bjornsson (University of Iceland),\nJens Hjorth (University of Copenhagen),\nAndreas Jaunsen (University of Oslo),\nPriya Natarajan (University of Cambridge, & Yale), and\nNial Tanvir (University of Hertfordshire)\n\n\tWe have obtained 1240 seconds of STIS images with the 50CCD\n(clear) aperture and 1185 seconds with the F28X50LP (long pass)\naperture of the host galaxy of GRB 980425.  This data was taken as\npart of the Survey of the Host Galaxies of Gamma-Ray Bursts (Holland\net al. GCN 698) approximately 778 days after the burst.  Combined\nimages are now available at\n\"http://www.ifa.au.dk/~hst/grb_hosts/data/index.html\" and a GIF image\nof the host galaxy is available at\n\"http://www.ifa.au.dk/~hst/grb_hosts/data/grb980425_colour.gif\".\n\n\tAn astrometric solution from VLT V-, R-, and I-band images\n(P.I., B. Libundgut) suggests that the supernova is located at X = 987\n+/- 2, Y = 1064 +/- 2 on our drizzled long pass image.  This is in an\nextended object with AB magnitudes of 26.2 +/- 0.1 in the STIS clear\nfilter and 26.3 +/- 0.1 in the STIS long pass filter.  An\nextrapolation of the V-band late-time light curve of SN 1998bw\n(McKenzie & Schaefer 1999, PASP, 111, 964) suggests that the SN\nremnant will have a magnitude of ~28.4 in the clear filter, which is\nnear the detection limit of our data.  The extended object has a\nfull-width at half-maximum, in the long pass image, of 0.13\narcseconds.  When the resolution limit (0.088 arcsec) is taken into\naccount the object has a diameter of, at most, ~0.09 arcsec.  For z =\n0.0085, and a cosmology with H0 = 65, Omega_matter = 0.2 and\nOmega_lambda = 0, this corresponds to a diameter of less than ~17 pc.\nThe colour and size of the object is consistent with it being a young\nstar cluster.  The extended object is embedded in a large extended\nfeature (possibly an HI region) with a diameter of ~75 pc and an\nestimated colour of V-R ~= 0.7 +/- 0.3.  A GIF image of the region\ncontaining the supernova is available at\n\"http://www.ifa.au.dk/~hst/grb_hosts/data/grb980425cd_sfr.gif\".  A\ndetailed analysis of these images is in progress (Holland et al. 2000,\nin preparation).",
  "circularId": 704,
  "createdOn": 961074743000,
  "email": "holland@ifa.au.dk",
  "subject": "GRB980425, HST/STIS observations of the host galaxy",
  "submitter": "Stephen Holland at IFA, U of Aarhus  <holland@ifa.au.dk>",
  "eventId": "GRB 980425"
}