{
  "bibcode": "2010GCN.10472....1M",
  "body": "A. N. Morgan, J. S. Bloom, and S. B. Cenko (UC Berkeley) report:\n\nWe observed the field of GRB 100305A (Troja et al., GCN 10470) with\nthe 1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began\nat 2010-03-05 09h29m30s UT, ~0.4 hours after the Swift trigger. �In\ninitial mosaics (effective exposure time of ~795.6 seconds) taken\nsimultaneously in the J, H, and Ks filters, we do not detect any\nsources within the XRT error circle.\n\nThe preliminary photometry yields:\n\npost_burst\nt_mid(min) �exp(s) �filt � �U. Limit (3 sig)\n34.6 � � � �795.6  �J � � � > 19.2\n34.6 � � � �795.6  �H � � � > 18.0\n34.6 � � � �795.6 � Ks � � �> 17.3\n\nObservations are ongoing. �All magnitudes given in the Vega system,\ncalibrated to 2MASS. �No correction for Galactic extinction has been\nmade to the above reported values.",
  "circularId": 10472,
  "createdOn": 1267786668000,
  "email": "qmorgan@gmail.com",
  "subject": "GRB 100305A: PAIRITEL NIR Upper Limits",
  "submitter": "Adam Morgan at U.C. Berkeley  <qmorgan@gmail.com>",
  "eventId": "GRB 100305A"
}