{
  "bibcode": "2000GCN...749....1H",
  "body": "GRB981226, HST/STIS observations of the host galaxy\n\nStephen Holland, Bjarne Thomsen (University of Aarhus),\nMichael Andersen (University of Oulu),\nGunnlaugur Bjornsson (University of Iceland),\nJohan Fynbo, Jens Hjorth (University of Copenhagen),\nAndreas Jaunsen (University of Oslo),\nPriya Natarajan (University of Cambridge, & Yale), and\nNial Tanvir (University of Hertfordshire)\n\n     We have obtained 7865 seconds of HST/STIS images with the 50CCD\n(clear) aperture and 7909.63 seconds of HST/STIS images with the\nF28X50LP (long pass) aperture of the host galaxy of GRB 981226.  These\ndata was taken as part of the Survey of the Host Galaxies of Gamma-Ray\nBursts (Holland et al. GCN 698) approximately 555 (clear) and 558\n(long pass) days after the burst.  Combined (drizzled) images are now\navailable at \"http://www.ifa.au.dk/~hst/grb_hosts/data/index.html\".\n\n     The galaxy identified by Frail et al. (1999, ApJL, 525, L81) is\nthe only object within the error circle of the radio transient (VLT\nJ232937.2-235553) associated with GRB 981226.  This galaxy is located\nat (X,Y) = (1033,1056) on the drizzled STIS clear image, has an\nellipticity of approximately 0.65, and its major axis has a position\nangle of approximately -75 degrees east of north.  We measured the\nfollowing AB magnitudes for this galaxy using an aperture with a 1.1\narcsecond radius: CL = 25.04 +/- 0.07 in the STIS clear aperture and\nLP = 24.50 +/- 0.10 in the STIS long pass aperture.  We used the\nphotometry of Walker (1994, PASP, 106, 828) to calibrate our data (see\nHolland et al. 2000, in preparation, for details) and found V-R = 0.50\n+/- 0.14, V = 24.80 +/- 0.08, and R = 24.30 +/- 0.11 in the Johnson\nand Kron-Cousins systems.  We note that the northeast side of the\ngalaxy is significantly bluer than the rest of the galaxy (see\n\"http://www.ifa.au.dk/~hst/grb_hosts/data/grb981226_colour.gif\").  We\nestimate that the blue structure on the north side of the galaxy has\nV-R = 0.1 and the south edge of the galaxy has V-R = 1.5.  There is a\ncompact source at each end of the blue structure.  The west source\ncorresponds to the photometric centre of the galaxy.\n\n     Frail et al. (1999) found that the galaxy was located 0.55 +/-\n0.53 arcseconds west and 0.41 +/- 0.43 arcseconds south of the radio\nafterglow.  This error ellipse encompasses the eastern half of the\ngalaxy and the eastern compact source in the blue structure.\n\n     We also note the presence of a faint point source (V ~= 28.4,\nV-R ~= 0.3), at (X,Y) = (1015,1064) in the drizzled STIS clear image,\napproximately 1.0 arcseconds from the nominal position of the radio\nafterglow.",
  "circularId": 749,
  "createdOn": 962984302000,
  "email": "holland@ifa.au.dk",
  "subject": "GRB981226, HST/STIS observations of the host galaxy",
  "submitter": "Stephen Holland at IFA, U of Aarhus  <holland@ifa.au.dk>",
  "eventId": "GRB 981226"
}