{
  "bibcode": "2007GCN..6525....1C",
  "body": "S. B. Cenko, E. O. Ofek (Caltech) and D. B. Fox (Penn State) report on\nbehalf of a larger collaboration:\n\nWe have imaged the field of GRB 070612A (Grupe et al., GCN 6509) with the\nautomated Palomar 60-inch telescope.  Images were taken in the Sloan i'\nfilter beginning at 4:27:29 12 June UT (~ 1.8 hr after the burst) at large\nairmass (> 2.5).\n\nInside the BAT error circle we identify a bright, stationary, variable\nsource located at coordinates (J2000.0):\n\n  \tRA: 08:05:29.61\n  \tDec: +37:16:15.2\n\nThe object increases in brightness over the duration of our exposure,\nranging from i' = 16.97 in our first image to i' = 16.27 approximately 2.2\nhours after the burst.\n\nGiven the brightness, we consider it likely this is the same candidate\nproposed by Updike et al. (GCN 6515), despite the fact that their position\ndiffers from ours by ~ 14\".  Furthermore, as first noted by this group,\nthere is a faint galaxy underlying the OT visible in the SDSS images of\nthis field (Cool et al., GCN 6510) located at RA: 08:05:29.64, Dec:\n+37:16:14.6 (J2000.0).  The photometric redshift, taken from the SDSS\ndatabase, for this putative host is z = 0.096 +/- 0.023.\n\nAltogether, GRB 070612A has 1) a very long duration (t90 ~ 370 s;\nBarthelmy et al., GCN 6522), 2) a bright, rising optical afterglow at t ~\n2 hr, and 3) an underlying, nearby (z ~ 0.1) putative host galaxy.  In all\nthese ways it is similar to XRF 060218.  Despite its proximity to the\nsun (~ 38 degrees away and setting), we encourage follow-up observations\nat all wavelengths while still possible to further investigate this\ninteresting source and search for signs of an associated supernova.",
  "circularId": 6525,
  "createdOn": 1181686519000,
  "email": "cenko@srl.caltech.edu",
  "subject": "GRB 070612A: P60 Confirmation of Afterglow and An Underlying, Nearby",
  "submitter": "S. Bradley Cenko at Caltech  <cenko@srl.caltech.edu>",
  "eventId": "GRB 070612A"
}