{
  "bibcode": "2014GCN.16937....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 observed the field of GRB 141004A (D'Elia, et al., GCN 16878) with\nthe Reionization and Transients Infrared Camera (RATIR; www.ratir.org)\non the 1.5m Harold Johnson Telescope at the Observatorio Astron��mico\nNacional on Sierra San Pedro M��rtir from 2014/10 21.31 to 2014/10 21.51\nUTC (392.08 to 396.95 hours after the BAT trigger), obtaining a total\nof 3.89 hours exposure in the r, i and z bands.\n\nWe continue to detect the source reported from the previous epoch of\nRATIR observations (Littlejohns, et al., GCN 16887). We obtain the\nfollowing detections and upper limit (3-sigma):\n\n  r     24.21 +/- 0.24\n  i     23.24 +/- 0.14\n  z     > 21.47\n\nThese magnitudes are in the AB system and are not corrected for Galactic\nextinction in the direction of the GRB.\n\nThese magnitudes suggest the source to remain brighter than expected if\ndetermined purely from a typical GRB power-law decay. This may\ncorroborate the claim of re-brightening (Schulze, et al., GCN 16936),\nhowever, it may also indicate the detection of the host galaxy (de Ugarte\nPostigo, et al., GCN 16902). We also note that these magnitudes are\nbroadly consistent with those observed by GROND at an approximate epoch\nof 32 hours after the initial Swift/BAT trigger (Schmidl, et al., GCN\n16899).\n\nWe thank the staff of the Observatorio Astron��mico Nacional in San Pedro\nM��rtir.",
  "circularId": 16937,
  "createdOn": 1413928692000,
  "email": "olittlej@asu.edu",
  "subject": "GRB 141004A: RATIR Late Time Optical and NIR Observations",
  "submitter": "Owen Littlejohns at Az State U  <olittlej@asu.edu>",
  "eventId": "GRB 141004A"
}