{
  "circularId": 15057,
  "email": "olittlej@asu.edu",
  "format": "text/plain",
  "bibcode": "2013GCN.15057....1L",
  "createdOn": 1375074818000,
  "subject": "GRB 130722A: RATIR Optical Observations",
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>",
  "editedOn": 1731005653671,
  "version": 2,
  "submitter": "Owen Littlejohns at Az State U  <olittlej@asu.edu>",
  "body": "Owen Littlejohns (ASU), Nat Butler (ASU), Alan M. Watson (UNAM), Alexander\nKutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Chris\nKlein (UCB), Ori Fox (UCB) J. Xavier Prochaska (UCSC), Josh Bloom (UCB),\nAntonino Cucchiara (UCSC), Eleonora Troja (GSFC), Enrico Ramirez-Ruiz\n(UCSC), José A. de Diego (UNAM), Leonid Georgiev (UNAM), Jesús González\n(UNAM), Carlos Román-Zúñiga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley\n(GSFC) report:\n\nWe observed the field of GRB 130722A (Melandri, et al., GCN 15013) 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 2013/07 23.23 to 2013/07 23.39 UTC (21.24 to\n25.00 hours after the BAT trigger), obtaining a total of 2.33 hours\nexposure in the i' band.\n\nWe detect the candidate GRB host galaxy from Melandri et al. (GCN 15015)\nnoting also that the source is extended. In comparison with USNO-B1, we\nobtain:\n\n i'     19.58 +/- 0.02\n\nThis magnitude is in the AB system and not corrected for Galactic\nextinction in the direction of the GRB.  We do not detect the candidate OT,\nalthough it is likely blended with the host galaxy. In comparison with the\nFaulkes measurement one night earlier, the OT has thus faded by at least\n1.5 magnitudes.\n\nWe thank the staff of the Observatorio Astronómico Nacional in San Pedro\nMártir.",
  "eventId": "GRB 130722A"
}