{
  "bibcode": "2010GCN.10419....1M",
  "body": "A. N. Morgan, B. E. Cobb, C. R. Klein, J. S. Bloom (UC Berkeley), report:\n\nWe observed the field of GRB 100213B (Vetere et al., GCN 10412) with\nthe 1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began\nunder good weather conditions at 2010-02-14 02:53:48 UT, ~3.92 hours\nafter the Swift trigger.  In mosaics (effective exposure time of ~2387\nseconds) taken simultaneously in the J, H, and Ks filters, we do not\ndetect any sources within the XRT error circle, nor at the potential\nNOT position (Malesani et al., GCN 10413).\n\nThe preliminary photometry yields:\n\npost_burst\nt_mid(h)    exp(s)  filt    U. Limit (3 sig)\n4.44        2387    J       > 19.2\n4.44        2387    H       > 18.2\n4.44        2387    Ks      > 17.1\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": 10419,
  "createdOn": 1266137869000,
  "email": "qmorgan@gmail.com",
  "subject": "GRB 100213B: PAIRITEL NIR Upper Limits",
  "submitter": "Adam Morgan at U.C. Berkeley  <qmorgan@gmail.com>",
  "eventId": "GRB 100213B"
}