{
  "bibcode": "2015GCN.18001....1B",
  "body": "Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William\nH. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB),\nJ. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara\n(ORAU/GSFC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico\nRamirez-Ruiz (UCSC), Jos�� A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes��s\nGonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM), Neil Gehrels (GSFC), and\nHarvey Moseley (GSFC) report:\n\nWe observed the field of possible GRB 150710A (trigger 648437; Bernardini,\net al., GCN 18000) with the Reionization and Transients Infrared Camera\n(RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the\nObservatorio Astron��mico Nacional on Sierra San Pedro M��rtir from 2015/07\n10.16 to 2015/07 10.20 UTC (3.47 to 4.31 hours after the BAT trigger),\nobtaining a total of 0.71 hours exposure in the r, i, and z bands.\n\nFor a source within the Swift-XRT error circle, in comparison with the SDSS\nDR9 catalog, we obtain the following upper limits (3-sigma):\n\n  r > 23.4\n  i > 23.2\n  z > 19.4\n\nThese magnitudes are in the AB system and are not corrected for Galactic\nextinction in the direction of the possible GRB.\n\nWe thank the staff of the Observatorio Astron��mico Nacional in San Pedro\nM��rtir.  Further observations are ongoing.",
  "circularId": 18001,
  "createdOn": 1436504313000,
  "email": "natbutler@asu.edu",
  "subject": "GRB 150710A: RATIR Observations",
  "submitter": "Nat Butler at Az State U  <natbutler@asu.edu>",
  "eventId": "GRB 150710A"
}