{
  "bibcode": "2006GCN..4440....1Z",
  "body": "N. Zimmerman, S. Tyagi, & J. P. Halpern (Columbia U.) report:\n\n\"Using the MDM 2.4m outfitted with RETROCAM, we have obtained an upper\nlimit on the SDSS r-band magnitude of GRB 060105 as of Jan. 6 02:00 UT, or\n19 hours after the burst. The sum of eight 5-minute exposures reveals no\nnew source within the refined XRT error circle (Godet et al,. GCN 4433) to\na limit of r = 21.0, as calibrated with Sloan standard stars.\"",
  "circularId": 4440,
  "createdOn": 1136553486000,
  "email": "jules@astro.columbia.edu",
  "subject": "GRB 060105: MDM Observation",
  "submitter": "Jules Halpern at Columbia U.  <jules@astro.columbia.edu>",
  "eventId": "GRB 060105"
}