{
  "bibcode": "2016GCN.19779....1W",
  "body": "Alan M. Watson (UNAM), Nat Butler (ASU), Alexander Kutyrev (GSFC),\nWilliam H. Lee (UNAM), Michael G. Richer (UNAM), Ori Fox (STScI), J.\nXavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara\n(GSFC/STScI), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico\nRamirez-Ruiz (UCSC), Jos�� A. de Diego (UNAM), Leonid Georgiev (UNAM),\nJes��s Gonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM), Neil Gehrels (GSFC),\nHarvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (ASU), and\nVicki Toy (UMD) report:\n\nWe observed the field of GRB 160804A (Marshall et al., GCN Circular\n19761) with 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 2016/08 5.16 to\n2016/08 5.27 UTC (26.33 to 29.04 hours after the BAT trigger), obtaining\na total of 1.78 hours exposure in the r and i bands and 0.75 hours\nexposure in the Z, Y, J, and H bands.\n\nWe detect a source coincident with Swift/UVOT source (Breeveld et al.,\nGCN Circular 19764) with the following magnitudes and 3-sigma upper\nlimit:\n\n  r = 21.29 +/- 0.02\n  i = 20.90 +/- 0.02\n  Z = 21.12 +/- 0.19 \n  Y = 21.04 +/- 0.29 \n  J = 20.52 +/- 0.23 \n  H > 20.51\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 Astron��mico Nacional in San Pedro\nM��rtir.",
  "circularId": 19779,
  "createdOn": 1470418809000,
  "email": "alan@astro.unam.mx",
  "subject": "GRB 160804A: RATIR Optical and NIR Observations",
  "submitter": "Alan M. Watson at Instituto de Astronomia UNAM  <alan@astro.unam.mx>",
  "eventId": "GRB 160804A"
}