{
  "subject": "GRB 150203A: RATIR Optical and NIR Observations",
  "format": "text/plain",
  "bibcode": "2015GCN.17383....1B",
  "createdOn": 1422945752000,
  "submitter": "Nat Butler at Az State U  <natbutler@asu.edu>",
  "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>",
  "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), José A. de Diego (UNAM), Leonid Georgiev (UNAM), Jesús\nGonzález (UNAM), Carlos Román-Zúñiga (UNAM), Neil Gehrels (GSFC), and\nHarvey Moseley (GSFC) report:\n\nWe observed the field of GRB 150203A (Ukwatta, et al., GCN 17377) 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 2015/02 3.19 to 2015/02 3.26 UTC (0.50 to 2.14\nhours after the BAT trigger), obtaining a total of 1.28 hours exposure in\nthe r, i, and z bands.\n\nWe find no uncatalogued sources within the Swift-XRT error circle (Evans,\net al., GCN 17378).  In comparison with USNO-B1 and 2MASS, we obtain the\nfollowing upper limits (3-sigma):\n\n  r > 23.1\n  i > 23.3\n  z > 20.1\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.",
  "email": "natbutler@asu.edu",
  "editedOn": 1731008511028,
  "version": 2,
  "circularId": 17383,
  "eventId": "GRB 150203A"
}