{
  "bibcode": "2016GCN.19370....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 160501A (Cummings et al., GCN Circ. 19365)\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 2016/05 1.33 to\n2016/05 1.47 UTC (7.23 to 10.70 hours after the BAT trigger), obtaining\na total of 1.73 hours exposure in the r and i bands and 0.66 hours\nexposure in the Z, Y, J, and H bands.\n\nFor a source within the enhanced Swift-XRT error circle (Evans et al.,\nGCN Circ. 19369), in comparison with the USNO-B1 and 2MASS catalogs, we\nobtain the following 3-sigma upper limits:\n\n r\t> 22.94\n i\t> 22.76\n Z\t> 21.69\n Y\t> 21.22\n J\t> 20.81\n H\t> 19.90\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": 19370,
  "createdOn": 1462117508000,
  "email": "alan@astro.unam.mx",
  "subject": "GRB 160501A: RATIR Optical and NIR Observations",
  "submitter": "Alan M. Watson at Instituto de Astronomia UNAM  <alan@astro.unam.mx>",
  "eventId": "GRB 160501A"
}