{
  "bibcode": "2014GCN.17003....1L",
  "body": "Owen Littlejohns (ASU), Nat Butler (ASU), Alan M. Watson (UNAM),\nAlexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer\n(UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier Prochaska (UCSC),\nJosh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja\n(GSFC), Enrico Ramirez-Ruiz (UCSC), Jos�� A. de Diego (UNAM), Leonid\nGeorgiev (UNAM), Jes��s Gonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM),\nNeil Gehrels (GSFC), and Harvey Moseley (GSFC) report:\n\nWe again observed the field of GRB 141004A (D'Elia, et al., GCN 16878)\nwith the Reionization and Transients Infrared Camera (RATIR;\nwww.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio\nAstron��mico Nacional on Sierra San Pedro M��rtir from 2014/10 31.31 to\n2014/10 31.46 UTC (26.34 to 26.48 days after the BAT trigger), obtaining\na total of 2.84 hours exposure in the r, i and z bands.\n\nWe continue to detect the source reported from previous epochs of RATIR\nobservations (Littlejohns, et al., GCN 16963; GCN 16937; GCN 16887). We\nobtain the following detections and upper limit (3 sigma):\n\n  r     23.62 +/- 0.19\n  i     23.17 +/- 0.15\n  z     > 21.09\n\nThese magnitudes are in the AB system and are not corrected for Galactic\nextinction in the direction of the GRB. In comparison to our previous\nepochs of observations, the source appears to have brightened in the r\nand i bands, consistent with an emerging supernova similar to SN 1998bw\n(Schulze, et al., GCN 16936).\n\nWe thank the staff of the Observatorio Astron��mico Nacional in San Pedro\nM��rtir.",
  "circularId": 17003,
  "createdOn": 1414781983000,
  "email": "olittlej@asu.edu",
  "subject": "GRB 141004A: Continued Late Time RATIR Optical and NIR Observations",
  "submitter": "Owen Littlejohns at Az State U  <olittlej@asu.edu>",
  "eventId": "GRB 141004A"
}