{
  "bibcode": "2006GCN..5046....1H",
  "body": "J. P. Halpern (Columbia U.) and N. Mirabal (U. Michigan) report:\n\n\"We observed the error box of Swift GRB 060501 (La Parola et al., GCN 5040)\nin the R band on the MDM 1.3m telescope starting on May 01 08:28 UT, \n13.4 minutes after the trigger, and continuing until 11:39 UT.  Because\nof poor seeing at high airmass, we were only able to detect the candidate\nafterglow (Fox & Cenko, GCN 5044) near the possible X-ray afterglow\n(La Parola et al., GCN 5042) beginning at 09:01 UT, or 46 minutes post-burst.\nWhile the candidate is clearly distinguished from nearby brighter stars,\none of which was apparently measured by Milne (GCN 5045), it was not\nclearly variable during the monitoring period.  Although it is difficult\nto measure due to contamination from nearby stars, we estimate R~20.7.\nAlso, because of the nearby stars, it is not possible to rule out that\nit is present at this level on the POSS II, and the DSS R and I images\nshow a hint of it.\n\nA finding chart for the candidate from the MDM images is available at\n\nhttp://www.astro.columbia.edu/~jules/grb/060501/mdm.jpg\n\nThis message may be cited.\"",
  "circularId": 5046,
  "createdOn": 1146522841000,
  "email": "jules@astro.columbia.edu",
  "subject": "GRB 060501: MDM Observations",
  "submitter": "Jules Halpern at Columbia U.  <jules@astro.columbia.edu>",
  "eventId": "GRB 060501"
}