{
  "bibcode": "2002GCN..1491....1L",
  "body": "W. D. Li, R. Chornock, and A. V. Filippenko (UC Berkeley) report on\nbehalf of the Lick Observatory and Tenagra Observatory Supernova\nSearch (LOTOSS; see IAU Circ. 7906):\n\n\"We have obtained additional observations of the optical afterglow of GRB020813\nwith the 0.8-m Katzman Automatic Imaging Telescope (KAIT) at Lick Observatory.\nWe continue to detect the object first reported by Fox et al. (GCN 1470) and\nalso observed by us (GCN 1473).  An unfiltered observation (600 s) obtained at\n14 Aug 04:36 UT shows an extended object at the position of the afterglow.\nAnother image (600 s unfiltered) obtained at 06:56 UT under better conditions\nshows two unresolved objects at that position separated by about 3.7\".  We\nidentify one of these objects with the fading GRB afterglow, and suggest that\nthe other object is a possible host galaxy (although it could be an unrelated\nfaint object).  We measured the following unfiltered magnitudes, in addition to\nthose reported in GCN 1473:\n\n13 Aug 8.3542 UT, mag 18.55 +/- 0.05\n14 Aug 4.5972 UT, mag 20.55 +/- 0.25 (host?+GRB)\n14 Aug 6.9333 UT, mag 21.08 +/- 0.30 (GRB only) host? = 20.70 +/- 0.25.\n\nWe note that the first and third observations imply a power-law decay index\nof about -1.44.  This is substantially steeper than the decay rate implied by \nthe early observations (GCN 1473, 1474), supporting the hypothesis of Bloom et \nal. (GCN 1476) that the object may have undergone a temporal break.\"\n\nThis message may be cited.",
  "circularId": 1491,
  "createdOn": 1029349187000,
  "email": "weidong@astron.berkeley.edu",
  "subject": "GRB020813: optical observations; possible host galaxy",
  "submitter": "Weidong Li at UC Berkeley KAIT/LOSS  <weidong@astron.berkeley.edu>",
  "eventId": "GRB 020813"
}