{
  "bibcode": "2005GCN..4208....1O",
  "body": "E. O. Ofek, S. B. Cenko, A. M.  Soderberg, S. R. Kulkarni (Caltech), D. B.\nFox (Penn State) report on behalf of the Caltech-NRAO-Carnegie\nCollaboration:\n\nWe have observed the entire error box of the IPN short hard burst GRB\n051103 (Golenetskii et al. 2005, GCN 4197) using the Robotic Palomar\n60-inch telescope.  We acquired 8 pointings (3-9 180sec R-band images\neach) that cover the entire IPN error box over epochs between 2.96 and\n3.16 days after the GRB trigger.\n\nA comparison between the Palomar 60-inch image and POSS2 R-band image\ndid not reveal any new source brighter than limiting magnitude of about\nR=19.5.  Our images are deeper than the POSS images, and there are\nseveral possible fainter variable/defects sources within the error box.\nSecond epoch images are scheduled.\n\nAssuming that the GRB is related with the M81/M82 group, and using a\ndistance modulus of 27.8 (Freedman et al. 1994), and A_R=0.2 Galactic\nextinction (Schlegel et al. 1998), we can set an upper limit of -8.5\n(comparable to the absolute magnitude of novae) on the R-band absolute\nmagnitude of an optical transient.",
  "circularId": 4208,
  "createdOn": 1131407613000,
  "email": "eran@wise1.tau.ac.il",
  "subject": "GRB051103: optical observations",
  "submitter": "Eran Ofek at Tel Aviv U.  <eran@wise1.tau.ac.il>",
  "eventId": "GRB 051103"
}