{
  "bibcode": "2010GCN.11265....1G",
  "body": "C. Guidorzi (U. Ferrara), Z. Cano, D. Bersier (LJMU),\nP. O'Brien (U. Leicester) report on behalf of a large collaboration:\n\nThe Faulkes Telescope North automatically began observing INTEGRAL\nGRB 100909A (Mereghetti et al. GCN Circ. 11260) on September 09,\n10:42:34 UT, 1.6 hours from the GRB trigger time.\nWithin the Swift-XRT error circle (Siegel et al. GCN Circ. 11261)\nwe identify an uncatalogued, possibly fading object at the following\nposition:\n\nRA(J2000.0):  04:55:47.86\nDec(J2000.0): +54:39:32.1\n\nwith the following magnitudes:\n\nMid Time from      Exposure      Filter     Magnitude\nGRB (hours)          (s)\n-------------------------------------------------------\n2.07                540            R        21.6 +- 0.2\n2.16                520            i        20.6 +- 0.1\n5.05               1200            R        22.1 +- 0.2\n-------------------------------------------------------\n\nCalibration was done against the nearby USNOB-1 star\nRA,DEC=04:55:49.14, +54:39:42.66, assuming R2=16.82, I=16.06.\nWe note that the uncatalogued source lies 3\" from a\nUSNOB-1 object with R2=18.54.",
  "circularId": 11265,
  "createdOn": 1284044316000,
  "email": "guidorzi@fe.infn.it",
  "subject": "GRB 100909A: Faulkes Telescope North afterglow candidate",
  "submitter": "Cristiano Guidorzi at Ferrara U,Italy  <guidorzi@fe.infn.it>",
  "eventId": "GRB 100909A"
}