{
  "bibcode": "2014GCN.17018....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 GRB 141031B (Gompertz, et al., GCN 16998) with the\nReionization and Transients Infrared Camera (RATIR; www.ratir.org) on the\n1.5m Harold Johnson Telescope at the Observatorio Astron��mico Nacional on\nSierra San Pedro M��rtir from 2014/11 1.10 to 2014/11 1.11 UTC (11.34 to\n11.75 hours after the BAT trigger), obtaining a total of 0.36 hours\nexposure in the r, i, and z bands.\n\nFor a source within the enhanced Swift-XRT error circle (Goad, et al., GCN\n17009), in comparison with the SDSS DR9, we obtain the following upper\nlimits (3-sigma):\n\n  r > 22.98\n  i > 22.81\n  z > 19.91\n\nThese magnitudes are in the AB system and are not corrected for Galactic\nextinction in the direction of the GRB.\n\nWe thank the staff of the Observatorio Astron��mico Nacional in San Pedro\nM��rtir.",
  "circularId": 17018,
  "createdOn": 1414857934000,
  "email": "natxbutler@gmail.com",
  "subject": "GRB 141031B: RATIR Optical and NIR Observation",
  "submitter": "Nat Butler at UC berkeley  <natxbutler@gmail.com>",
  "eventId": "GRB 141031B"
}