{
  "bibcode": "2016GCN.19588....1T",
  "body": "Eleonora Troja (GSFC), Nat Butler (ASU), Alan M. Watson (UNAM),\nAlexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM),\nOri Fox (STScI), J. Xavier Prochaska (UCSC), Josh Bloom (UCB),\nAntonino Cucchiara (GSFC/STScI), Owen Littlejohns (ASU),\nEnrico Ramirez-Ruiz (UCSC), Jos�� A. de Diego (UNAM), Leonid Georgiev\n(UNAM), Jes��s Gonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM), Neil\nGehrels (GSFC), Harvey Moseley (GSFC), John Capone (UMD), V. Zach\nGolkhou (ASU), and Vicki Toy (UMD) report:\n\nWe observed the field of the Fermi LAT GRB 160625B (Dirirsa, et al., GCN \n19580)\nwith the Reionization and Transients Infrared Camera (RATIR; www.ratir.org)\non the 1.5m Harold Johnson Telescope at the Observatorio Astron��mico \nNacional\non Sierra San Pedro M��rtir from 2016/06 26.30 to 2016/06 26.32 UTC (8.53\nto 9.02 hours after the LAT trigger), obtaining a total of 0.36 hours\nexposure in the r and i bands and 0.15 hours exposure in the Z, Y, J\nand H bands.\n\nWe detect a bright, fading and uncatalogued source at the edge of the \nSwift-XRT\nerror circle (Melandri, et al., GCN 19585), at a position RA, Dec = \n20:34:23.50,\n+6:55:8.1 (J2000, +/-0.5\"). In comparison with the USNO-B1 and 2MASS \ncatalogs,\nwe obtain the following values:\n\n   r    = 18.28 +/- 0.01\n   i    = 18.08 +/- 0.01\n   Z    = 17.95 +/- 0.01\n   Y    = 17.78 +/- 0.01\n   J    = 17.77 +/- 0.02\n   H    = 17.65 +/- 0.02\n\nThese magnitudes are in the AB system and are not corrected for Galactic\nextinction in the direction of the GRB.\n\nFurther observations are on-going.\n\nWe thank the staff of the Observatorio Astron��mico Nacional in San Pedro\nM��rtir.",
  "circularId": 19588,
  "createdOn": 1466929137000,
  "email": "eleonora.troja@nasa.gov",
  "subject": "GRB 160625B: RATIR Optical and NIR Afterglow Detection",
  "submitter": "Eleonora Troja at GSFC  <eleonora.troja@nasa.gov>",
  "eventId": "GRB 160625B"
}