{
  "bibcode": "2011GCN.12657....1T",
  "body": "N. R. Tanvir (U. Leicester) and A. J. Levan (U. Warwick) report on\nbehalf of a larger collaboration:\n\nWe obtained short exposures of the field of GRB 111210A (Siegel et\nal. GCN 12650) with Gemini-North using the GMOS instrument,\nbeginning at 2011-Dec-10 15:16UT, approximately 39 minutes post-burst.��\nWithin the refined XRT position (Goad et al. GCN12652) we find a faint\nsource which is visible in both z and r filters.�� Calibrated against nearby\nUSNO stars we find a magnitude of r~23, with an estimated error\nof +/-0.2 random and +/-0.3 calibration.\n\nOur astrometry gives a position (conservative uncertainty of 0.5 arcsec) of:\n\nRA(2000)= 12 45 54.40\ndec(2000)= -07 09 57.4\n\nWe thank the Gemini staff, particularly Kristin Chiboucas and\nRachel Mason, for assistance with these observations.",
  "circularId": 12657,
  "createdOn": 1323564170000,
  "email": "nrt3@star.le.ac.uk",
  "subject": "GRB 111210A: Gemini-North candidate counterpart",
  "submitter": "Nial Tanvir at U.Leicester  <nrt3@star.le.ac.uk>",
  "eventId": "GRB 111210A"
}