{
  "bibcode": "2009GCN.10281....1M",
  "body": "A. Melandri (Liverpool JMU), C. Guidorzi (U. Ferrara), C.G. Mundell,\nZ. Cano (Liverpool JMU), A. Gomboc (U. Ljubljana), N. Tanvir (Leicester)\nreport on behalf of a large collaboration:\n\nOn December 15th at 15:43:50 UT we observed the field of the possible\nGRB 091215 (trigger 379449, Sakamaoto et al., GCN 10280) with the the\n2-m Faulkes Telescope North. Automatic observations were performed\nusing BVRi' filters.\n\nWe do not detect any obvious bright optical afterglow in the field of  \nview, that\ncovers almost entirely the BAT error circle reported by Sakamoto et  \nal. (GCN 10280).\n\nWe calibrated our images using SDSS for the i' band and USNOB-1 for the\nR band and derived conservative upper limits for the OT :\n\nMid Time   Total Exp      Filter    Magnitude\n(min)                  (s)\n-----------------------------------------------------------\n  5.3                    30              R          > 18.5\n16.5                 100              i'          > 19.2\n-----------------------------------------------------------",
  "circularId": 10281,
  "createdOn": 1260897692000,
  "email": "axm@astro.livjm.ac.uk",
  "subject": "GRB 091215: Faulkes Telescope North observations",
  "submitter": "Andrea Melandri at Liverpool John Moores U  <axm@astro.livjm.ac.uk>",
  "eventId": "GRB 091215"
}