{
  "bibcode": "2011GCN.12729....1S",
  "body": "T. Sakamoto (UMBC/GSFC), D. Donato (ORAU/GSFC), N. Gehrels (GSFC),\nT. Okajima (GSFC), Y. Urata (NCU)\n\nWe observed the field of GRB 111225A detected by Swift\n(trigger #510341; Siegel et al., GCN Circ. 12720) with the 14-inch\nGoddard Robotic Telescope (GRT) located at the Goddard Geophysical\nand Astronomical Observatory (http://cddisa.gsfc.nasa.gov/ggao/).\n\nA total 20 images of 60 sec (10 images), 180 sec (5 images) and \n300 sec (5 images) exposures were taken in the R filter starting \nfrom December 25 03:52:12  (UT) about 94 seconds after the trigger \n(50 seconds after the BAT position notice) and stopped on December 25 \n04:43:53 (UT).  We do not detect the optical afterglow both in the \nindividual images and the stacked image inside the enhanced XRT position \n(Evans et al., GCN #12724).  The estimated upper limit of the combined \nimage (total exposure of 3000 sec) is ~18.5 mag using the USNO-B1 catalog.",
  "circularId": 12729,
  "createdOn": 1324858574000,
  "email": "takanori.sakamoto-1@nasa.gov",
  "subject": "GRB 111225A: GRT Optical Observation",
  "submitter": "Takanori Sakamoto at NASA/GSFC  <takanori.sakamoto-1@nasa.gov>",
  "eventId": "GRB 111225A"
}