{
  "bibcode": "2018GCN.22911....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 (UVI),\nEleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz\n(UCSC), Jes��s Gonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM), Harvey\nMoseley (GSFC), John Capone (UMD), V. Zach Golkhou (U. Wash.), and Vicki\nToy (UMD) report:\n\nWe observed the field of GRB 180705A (Stamatikos et al., GCN Circ.\n22902) 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 2018/07 6.16 to\n2018/07 6.27 UTC (12.19 to 14.82 hours after the BAT trigger), obtaining\na total of 1.74 hours exposure in the r and i bands.\n\nFor a source within the Swift-XRT error circle (Kennea et al., GCN Circ.\n22903), in comparison with the SDSS DR9 catalog, we obtain the following\n3-sigma upper limits:\n\n  r > 23.20 \n  i > 23.07\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": 22911,
  "createdOn": 1530868782000,
  "email": "alan@astro.unam.mx",
  "subject": "GRB 180705A: RATIR Optical Observations",
  "submitter": "Alan M. Watson at Instituto de Astronomia UNAM  <alan@astro.unam.mx>",
  "eventId": "GRB 180705A"
}