{
  "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 (UCSC),\nEleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC),\nJosé A. de Diego (UNAM), Leonid Georgiev (UNAM), Jesús González (UNAM),\nCarlos Román-Zúñiga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC)\nreport:\n\nWe observed the field of GRB 130912A (D'Elia et al., GCN 15212) with the\nReionization and Transients Infrared Camera (RATIR; www.ratir.org) on the\n1.5m Harold Johnson Telescope at the Observatorio Astronómico Nacional on\nSierra San Pedro Mártir from 2013/09 13.30 to 2013/09 13.49 UTC (22.58 to\n27.11 hours after the BAT trigger), obtaining a total of 5.33 hours\nexposure in the r and i bands and 2.24 hours exposure in the Z, Y, J, and H\nbands.\n\nFor a source within the Swift-XRT error circle, in comparison with USNO-B1\nand 2MASS, we obtain the following upper limits (3-sigma):\n\n  r     > 23.89\n  i     > 23.79\n  Z     > 22.86\n  Y     > 22.38\n  J     > 22.30\n  H     > 21.78\n\nThese magnitudes are in the AB system and are not corrected for Galactic\nextinction in the direction of the GRB.    Our observations confirm that\nthe source faded\nand is therefore the short GRB afterglow.\n\nWe thank the staff of the Observatorio Astronómico Nacional in San Pedro\nMártir.",
  "editedBy": "Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>",
  "email": "natbutler@asu.edu",
  "editedOn": 1731009743570,
  "format": "text/plain",
  "submitter": "Nat Butler at Az State U  <natbutler@asu.edu>",
  "subject": "GRB 130912A: RATIR Optical and NIR Upper Limits",
  "version": 2,
  "circularId": 15226,
  "createdOn": 1379085938000,
  "eventId": "GRB 130912A",
  "bibcode": "2013GCN.15226....1B"
}