{
  "bibcode": "2011GCN.11998....1M",
  "body": "A. N. Morgan, and J. S. Bloom (UC Berkeley) report:\n\nWe observed the field of GRB 110503A (Stamatikos et al., GCN 11991)\nwith the 1.3m PAIRITEL located at Mt. Hopkins, Arizona under poor sky\nconditions. Observations began at 2011-05-04 02:46:35 UT, ~9.2 hours\nafter the Swift Trigger.  In mosaics (effective exposure time of 1.28\nhours) taken simultaneously in the J and H filters, we marginally\ndetect a source at the optical afterglow location (Stamatikos et al.,\nGCN 11991; Leloudas et al., GCN 11994; Kann et al., GCN 11996).  Our\npreliminary Ks band reduction is corrupted.\n\nThe preliminary photometry yields:\n\npost burst\nt_mid (hr) exp.(hr) filt  mag    m_err\n10.2       1.28     J     18.19  0.26\n10.2       1.28     H     17.86  0.36\n\nAll magnitudes are given in the Vega system, calibrated to 2MASS. No\ncorrection for Galactic extinction has been made to the above reported\nvalues.",
  "circularId": 11998,
  "createdOn": 1304491006000,
  "email": "qmorgan@gmail.com",
  "subject": "GRB 110503A: PAIRITEL NIR Detection",
  "submitter": "Adam Morgan at U.C. Berkeley  <qmorgan@gmail.com>",
  "eventId": "GRB 110503A"
}