{
  "bibcode": "2012GCN.13055....1T",
  "body": "N. R. Tanvir (U. Leicester), O. Hartoog (U. Amsterdam), and\nT. Schrabback (U. Bonn) report on behalf of a larger collaboration:\n\nWe imaged the field of GRB120312A (Stamatikos et al. GCN13049) using the\nWHT/ACAM beginning 05:15 UT on March 13th (approximately 13 hours post-burst).\nA 24 minute integration was obtained in the z-band.\n��\nWithin the refined XRT error circle (Mangano et al. GCN13053) we find a source\nat position:\n\nRA(2000) = 16 47 09.23\ndec(2000)= +23 51 28.9\n\nThe source may be slightly extended, although the S/N is too poor to\ndetermine this with confidence.�� Its provisional magnitude is\nz~23.8 +/- 0.2 calibrated against nearby SDSS DR8 stars.",
  "circularId": 13055,
  "createdOn": 1331624176000,
  "email": "nrt3@star.le.ac.uk",
  "subject": "GRB 120312A: WHT candidate afterglow",
  "submitter": "Nial Tanvir at U.Leicester  <nrt3@star.le.ac.uk>",
  "eventId": "GRB 120312A"
}