{
  "bibcode": "2015GCN.17894....1W",
  "body": "Alan M. Watson (UNAM), Nat Butler (ASU), Alexander Kutyrev (GSFC),\nWilliam H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB),\nOri Fox (UCB), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino\nCucchiara (ORAU/GSFC), 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),\nand Harvey Moseley (GSFC) report:\n\nWe observed the field of GRB 150530A (Starling et al., GCN 17888) with the\nReionization and Transients Infrared Camera (RATIR; www.ratir.org) on the\n1.5m Harold Johnson Telescope at the Observatorio Astron��mico Nacional on\nSierra San Pedro M��rtir from 2015/05 31.32 to 2015/05 31.45 UTC (20.08\nto 23.21 hours after the BAT trigger), obtaining a total of 2.49 hours\nexposure in the r, i, and z bands.\n\nFor a source within the Swift-XRT error circle, in comparison with 2MASS, we\nobtain the following upper limits (3-sigma):\n\n  r > 24.42\n  i > 24.18\n  z > 20.44\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": 17894,
  "createdOn": 1433100714000,
  "email": "alan@astro.unam.mx",
  "subject": "GRB 150530A: RATIR Optical Observations",
  "submitter": "Alan M. Watson at Instituto de Astronomia UNAM  <alan@astro.unam.mx>",
  "eventId": "GRB 150530A"
}