{
  "bibcode": "2005GCN..4356....1G",
  "body": "C. Guidorzi, A. Monfardini, I.A. Steele, A. Gomboc, C.G. Mundell,\nC.J. Mottram, R.J. Smith, D. Bersier, A. Melandri, S. Kobayashi, \nD. Carter, M.F. Bode (Liverpool JMU), N. Tanvir (Hertfordshire)\nreport:\n\n\n\"The 2-m Faulkes Telescope North observed GRB051211A discovered by\nHETE-2 (Atteia et al, GCN 4324) from 5.9 to 11.9 hours after the\nburst.\nSo far, searches for afterglow have provided just upper limits in the\noptical (de Ugarte Postigo et al. GCN 4325 & GCN 4335, Klotz et al. GCN\n4329, Jelinek et al. GCN 4333, Maeno et al. GCN 4339, Blustin et al. GCN\n4342, Zhuchkov et al. GCN 4344) as well as in the X-rays (Cusumano et al.\nGCN 4326).\nFrom the comparison of two 30-min stacked images, we found an object at\nRA=06:56:09.0, DEC= +32:40:06.4 (J2000) showing some evidence of a fading\nof 0.6 +- 0.3 mag (calibrated with USNOB stars of the field, with an\nuncertainty of 0.4 mag affecting just the absolute values, but not the\nrelative ones). It lies 63 arcsec away from the HETE-2 centroid (given\nwith an error radius of 80 arcsec at 90% CL).\n\n-----------------------------------------------------\nStart Time\tFilter\tExposure\tMag\nsince GRB\n \n 6.3 hr\t\tR\t12x150s\t\t21.15 +- 0.15\n11.4 hr\t\tR\t12x150s\t\t21.75 +- 0.20\n-----------------------------------------------------\n \nThis candidate does not match any DSS source, although we notice a small\nblur in the DSS IR that might be either a faint source or a background\nfluctuation.\nIf we assume the fading is genuine, the average temporal decay\npower-law index turns out to be around 1.0 +- 0.5.\nHowever, a word of caution is required, as the source magnitude is\nclose to the limiting value affected by the moonlight.\n \nAn image of the OT candidate at both epochs is available at the following:\n \nhttp://www.astro.livjm.ac.uk/~crg/GRB051211A_possible_OT_FTN.jpg\n \nWe encourage further observations.\"",
  "circularId": 4356,
  "createdOn": 1134656011000,
  "email": "crg@astro.livjm.ac.uk",
  "subject": "GRB051211A: possible optical candidate",
  "submitter": "Cristiano Guidorzi at ARI,Liverpool JMU  <crg@astro.livjm.ac.uk>",
  "eventId": "GRB 051211A"
}