{
  "bibcode": "2007GCN..6758....1G",
  "body": "C. Guidorzi (U. Bicocca/INAF-OAB), R.J. Smith, A. Melandri,\nI.A. Steele, C.G. Mundell, M.J. Burgdorf, C.J. Mottram,\nM.F. Bode, S.N. Fraser, S. Kobayashi, D.F. Bersier (Liverpool JMU),\nA. Gomboc (Ljubljana), P. O'Brien, E. Rol, N. Bannister, N. Tanvir\n(U. Leicester) report on behalf of larger GRB collaboration:\n\n\nOn 2007 Aug 10 at 15:22:06 UT the 2-m Faulkes Telescope South\nautomatically observed the field of GRB 070810B (trigger 287409,\nMarshall et al., GCN Circ. 6743).\n\nIn our coadded frames we do not detect anything corresponding to\nXRT sources 1 or 2 (Starling et  al., GCN Circ. 6754)\ndown to the limiting magnitudes reported below.\n\n\nFilter  Tstart(min)  Tstop(min)    Exposure(s)    M_lim\n-------------------------------------------------------\n    R       2.80          64.3          840         21.2\n    i'      6.22          54.9          520         21.5\n-------------------------------------------------------\n\nMagnitudes are calibrated with respect to USNOB1 R2 in the R filter.\nFor the SDSS-i' filter we calibrated with the i' magnitudes derived for\nUSNOB1 field stars by converting from the (R2,I) magnitudes.",
  "circularId": 6758,
  "createdOn": 1186945175000,
  "email": "cristiano.guidorzi@brera.inaf.it",
  "subject": "GRB 070810B : Faulkes Telescope South Observations",
  "submitter": "Cristiano Guidorzi at INAF-OAB  <cristiano.guidorzi@brera.inaf.it>",
  "eventId": "GRB 070810B"
}