{
  "editedOn": 1731005569011,
  "version": 2,
  "eventId": "GRB 130907A",
  "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 130907A (Page et al., GCN 15183) 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 10.12 to 2013/09 10.16 UTC (53.18 to\n54.12 hours after the BAT trigger), obtaining a total of 0.71 hours\nexposure in the r and i bands and 0.30 hours exposure in the Z, Y, J, and H\nbands.\n\nFor the source reported in Lee et al. (GCN 15192), in comparison with SDSS\nDR9 and 2MASS, we obtain the following detections and upper limits\n(3-sigma):\n\n  r   21.92 +/- 0.12\n  i   21.38 +/- 0.09\n  Z   > 21.37\n  Y   > 20.87\n  J   > 20.58\n  H   > 19.97\n\nThese magnitudes are in the AB system and are not corrected for Galactic\nextinction in the direction of the GRB.  The source has faded by about two\nmagnitudes in all bands since our measurements two nights ago (Lee et al.,\nGCN 15192).  We note that the source intensity in the r and i bands is now\ncomparable to the cataloged values for the spatially coincident galaxy SDSS\nJ142333.95+453626.2.\n\nWe thank the staff of the Observatorio Astronómico Nacional in San Pedro\nMártir.",
  "submitter": "Nat Butler at Az State U  <natbutler@asu.edu>",
  "circularId": 15208,
  "createdOn": 1378792566000,
  "email": "natbutler@asu.edu",
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>",
  "bibcode": "2013GCN.15208....1B",
  "subject": "GRB 130907A: RATIR Optical and NIR Observations",
  "format": "text/plain"
}