{
  "bibcode": "2009GCN..9837....1H",
  "body": "J. P. Halpern and J. Ruan (Columbia U.) report:\n\nWe obtained R-band photometry of the USNO-B1.0 object 341-0096763\non 2009 August 21 10:46 UT using the McGraw Hill 1.3m telescope.\nIn five 300 s exposures in seeing of 1.5\"-1.8\", there is no evidence\nto support the hypothesis of Holland et al. (GCN Circ. 9831) that this\nobject is the host galaxy of GRB 090817.  The image is consistent\nwith the stellar point spread function.  Using the reference star of\nRumyantsev et al. (GCN Circ. 9828), we measure R = 19.39+/-0.04,\nconsistent with their photometry on Aug. 17.\n\nOn Aug. 25 09:56 UT, we again obtained five 300 s exposures in seeing\nof 1.5\".  We measure R = 19.42+/-0.03, 8.4 days after the burst,\nwhich is consistent with all previous measurements.  Thus, there is\nno evidence for brightening suggested by Holland et al. (GCN Circ. 9834)\nfrom Swift UVOT observations between 6.5 and 7.1 days.  The set of\nconsistent magnitudes from day zero in GCN Circ. 9828 to days 4 and 8\nin this report are indicative of a chance coincidence with a normal star.",
  "circularId": 9837,
  "createdOn": 1251198973000,
  "email": "jules@astro.columbia.edu",
  "subject": "GRB 090817: No host galaxy, no supernova",
  "submitter": "Jules Halpern at Columbia U.  <jules@astro.columbia.edu>",
  "eventId": "GRB 090817"
}