{
  "bibcode": "2005GCN..3990....1B",
  "body": "J. S. Bloom (UC Berkeley) reports:\n\n\"Further imaging of the field of GRB 050915a (GCNs 3977, 3979, 3983)  \nwith the PAIRITEL 1.3m began at  2005-09-16 10:58:38 UTC. We confirm  \nthat the source present in the first epoch (GCN 3984) has faded and  \nis thus the likely IR afterglow of GRB 050915a. In particular, the  \nmean H-band magnitude of the source during the first epoch was  \nH=18.25 +/- 0.16. The source was undetected in the second epoch, with  \nan approximate 3-sigma detection threshold of H(upper limit)=18.55 mag.\n\nAn improved astrometric solution was obtained for the imaging on  \n2005-09-15 UTC, yielding a J2000 position of the IRT of:\n\n    RA    =  05:26:44.804\n    DEC = -28:00:59.27\n\nThe 1 sigma uncertainties relative to the 2MASS catalog are 0.18\" and  \n0.09\" in RA and DEC, respectively. This position is 3.2\" from the  \nrevised XRT position reported by Grupe et al. (GCN 3983).\n\nWe encourage deep z band and NIR imaging.\"\n\nThis message may be cited.",
  "circularId": 3990,
  "createdOn": 1126882332000,
  "email": "jbloom@astron.berkeley.edu",
  "subject": "GRB 050915a: IR Transient",
  "submitter": "Josh Bloom at UC Berleley  <jbloom@astron.berkeley.edu>",
  "eventId": "GRB 050915A"
}