{
  "bibcode": "2005GCN..3530....1H",
  "body": "J. P. Halpern (Columbia), J. Kemp (Joint Astronomy Centre and Columbia),\nand N. Mirabal (U. Michigan), report on behalf of the MDM Observatory\nGRB follow-up team:\n\nWe monitored the location of Swift GRB 050607 and its decaying X-ray\nafterglow (Retter et al., GCN #3525; Pagani et al., GCN #3528) in the\nR band with the MDM 2.4m telescope beginning 16 minutes after the\ntrigger, and extending to 2 hours.  Seeing was approximately 1.1\".\nThe afterglow candidate discovered by Rhoads (GCN #3527) is present\nin all of our images with 22.5 < R < 23, and appears to have faded.\nHowever, it is difficult for us to characterize its variability at \nthis stage in the analysis as there may also be extended emission.\nIf correct, this is the faintest optical afterglow detected at the\nequivalent time (Berger et al., astro-ph/0502468), even taking into\naccount the 0.4 magnitudes of R-band Galactic absorption in this\ndirection.\n\nImages are posted at http://www.astro.columbia.edu/~jules/grb/050607/",
  "circularId": 3530,
  "createdOn": 1118166685000,
  "email": "jules@astro.columbia.edu",
  "subject": "GRB 050607: MDM Observations",
  "submitter": "Jules Halpern at Columbia U.  <jules@astro.columbia.edu>",
  "eventId": "GRB 050607"
}