{
  "bibcode": "2019GCN.24282....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 (UVI), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz\n(UCSC), Jes��s Gonz��lez (UNAM), Carlos Roman-Zuniga (UNAM),\nHarvey Moseley (GSFC), John Capone (UMD), V. Zach Golkhou (U. Wash.),\nand Vicki Toy (UMD) report:\n\nWe observed the field of GRB 190427A (Tohuvavohu, et al., GCN 24261)\nwith the Reionization and Transients Infrared Camera (RATIR;\nwww.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio\nAstronomico Nacional on Sierra San Pedro Martir from 2019/04 27.28 to\n2019/04 27.30 UTC (2.22 to 2.53 hours after the BAT trigger), obtaining\na total of 0.20 hours exposure in the r and i bands and 0.06 hours\nexposure in the Z, Y, J, and H bands.\n\nIn comparison with the SDSS DR9 catalog, we detect no new source brighter\nthan r~22 AB mag within the BAT error circle.\n\nWe thank the staff of the Observatorio Astron��mico Nacional in San Pedro\nMartir.",
  "circularId": 24282,
  "createdOn": 1556374109000,
  "email": "eleonora@umd.edu",
  "subject": "GRB 190427A: RATIR Optical and NIR Observations",
  "submitter": "Eleonora Troja at NASA/GSFC/UMD  <eleonora@umd.edu>",
  "eventId": "GRB 190427A"
}