{
  "bibcode": "2010GCN.11506....1C",
  "body": "S. B. Cenko (UC Berkeley) reports on behalf of a larger collaboration:\n\nWe have imaged the field of GRB101225A (Racusin et al., GCN 11493) with\nthe automated Palomar 60 inch telescope.  Images were obtained in the\nSloan r' and i' filters on 2010 December 28 beginning at 01:49 UT (~ 55.2\nhours after the BAT trigger time).\n\nWe detect a faint source at the location of the optical afterglow (Xu et\nal., GCN 11495) in both filters.  Using a set of nearby sources from the\nUSNO-B1 catalog for reference, we measure the following magnitudes for the\nsource at this time: R = 22.8 +/- 0.2; I = 22.3 +/- 0.2.\n\nOur R-band measurement is consistent with that found by Wiersema et al\n(GCN 11502) at t ~ 28 hours, but fainter (in both R and I) than the values\nreported by Thoene at al (GCN 11503) at a similar time.  In either case,\nwe find no evidence for a re-brightening as of yet, as would be expected\nfor the emergence of supernova emission from a nearby event like\nGRB060218/SN2006aj.",
  "circularId": 11506,
  "createdOn": 1293647570000,
  "email": "cenko@srl.caltech.edu",
  "subject": "GRB 101225A: P60 Observations",
  "submitter": "S. Bradley Cenko at Caltech  <cenko@srl.caltech.edu>",
  "eventId": "GRB 101225A"
}