{
  "subject": "GRB131031A: RATIR Optical and NIR Observations",
  "format": "text/plain",
  "createdOn": 1383353778000,
  "version": 2,
  "eventId": "GRB 131031A",
  "editedOn": 1731005843095,
  "bibcode": "2013GCN.15438....1C",
  "email": "acucchia@ucolick.org",
  "body": "A. Cucchiara (ORAU/GSFC), Nat Butler (ASU), Alan M. Watson (UNAM), \nAlexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), \nChris Klein (UCB), Ori Fox (UCB), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), \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), \nand Harvey Moseley (GSFC) report:\n\nWe observed the field of GRB 131031A (Cummings et al., GCN 15421) 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 2013/11 1.21 to 2013/11 1.48 UTC (17.44\nto 23.99 hours after the BAT trigger), obtaining a total of 4.47 hours\nexposure in the r and i bands and 1.81 hours exposure in the Z,\nY, J, and H bands.\n\nThe source within the XRT error circle (Gompertz et al., GCN 15424) and \nconfirmed by Gorosabel et al. (GCN 15426) is clearly detected. \nIn comparison with the SDSS DR9 and 2MASS, we\nobtain the following detections and upper limits (3-sigma):\n\n r 22.38 +/- 0.07\n i 22.34 +/- 0.09\n Z 21.89 +/- 0.14\n Y > 21.81\n J > 21.36 \n H > 20.69 \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 Astronómico Nacional in San Pedro \nMártir.",
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>",
  "circularId": 15438,
  "submitter": "Antonino Cucchiara at UCSC/UCO Lick  <acucchia@ucolick.org>"
}