{
  "bibcode": "2016GCN.19131....1B",
  "body": "Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William\nH. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J. Xavier\nProchaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (GSFC/STScI),\nEleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC),\nJos�� A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes��s Gonz��lez (UNAM),\nCarlos Rom��n-Z����iga (UNAM), Neil Gehrels (GSFC), Harvey Moseley (GSFC),\nJohn Capone (UMD), V. Zach Golkhou (ASU), and Vicki Toy (UMD) report:\n\nWe observed the field of GRB 160303A (Beardmore, et al., GCN 19126) with\nthe Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on\nthe 1.5m Harold Johnson Telescope at the Observatorio Astron��mico Nacional\non Sierra San Pedro M��rtir from 2016/03 3.46 to 2016/03 3.52 UTC (1.8\nminutes to 1.50 hours after the BAT trigger), obtaining a total of 1.02\nhours exposure in the r and i bands and 0.44 hours exposure in the Z, Y, J,\nand H bands.\n\nWe detect an uncatalogued source within the Swift-XRT error circle, in\ncomparison with the SDSS DR9 and 2MASS catalogs, we obtain the following\ndetections and upper limits (3-sigma):\n\n  r = 22.95 +/- 0.31\n  i = 22.65 +/- 0.23\n  Z > 21.98\n  Y = 21.83 +/- 0.36\n  J > 21.30\n  H > 21.01\n\nThese magnitudes are in the AB system and are not corrected for Galactic\nextinction in the direction of the GRB.  The source is located at RA, Dec =\n11:14:48.12, +22:44:32.6 (J2000, +/-0.5\").\n\nWe thank the staff of the Observatorio Astron��mico Nacional in San Pedro\nM��rtir.",
  "circularId": 19131,
  "createdOn": 1457010430000,
  "email": "natxbutler@gmail.com",
  "subject": "GRB 160303A: RATIR Optical and NIR Afterglow Detection",
  "submitter": "Nat Butler at UC berkeley  <natxbutler@gmail.com>",
  "eventId": "GRB 160303A"
}