{
  "bibcode": "2013GCN.14799....1B",
  "body": "Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William\nH. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB)\nJ. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (UCSC),\nEleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC),\nJos� A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes�s Gonz�lez (UNAM),\nCarlos Rom�n-Z��iga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC)\nreport:\n\nWe observed the field of GRB 130606A (Ukwatta, et al., GCN 14781) 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 2013/06 7.19 to 2013/06 7.20 UTC (7.38 to 7.79\nhours after the BAT trigger), obtaining a total of 0.36 hours exposure in\nthe r' and i' bands and 0.15 hours exposure in the Z, Y, J, and H bands.\n\nThe optical/NIR afterglow (Jelinek, et al., GCN 14782; Xu et al., GCN\n14783) is quite red and clearly detected in all bands but r'.  In\ncomparison with SDSS DR9 and 2MASS, we obtain the following detections and\n3-sigma upper limit:\n\nr' > 23.02\ni' 21.16 +/- 0.06\nZ  18.79 +/- 0.03\nY  18.40 +/- 0.03\nJ  18.32 +/- 0.03\nH  17.92 +/- 0.03\n\nThese magnitudes are in the AB system and not corrected for Galactic\nextinction in the direction of the GRB.  The lack of detection in r' and\nrelatively faint flux level in i' are consistent with the high-redshift\ndetermined from spectroscopy (Castro-Tirado, et al., GCN 14790, 14796;\nLunnan, et al., GCN 14798).\n\nWe thank the staff of the Observatorio Astron�mico Nacional in San Pedro\nM�rtir.  Further observations are planned.",
  "circularId": 14799,
  "createdOn": 1370584003000,
  "email": "natbutler@asu.edu",
  "subject": "GRB 130606A: RATIR r'-band Dropout",
  "submitter": "Nat Butler at Az State U  <natbutler@asu.edu>",
  "eventId": "GRB 130606A"
}