{
  "submitter": "Owen Littlejohns at Az State U  <olittlej@asu.edu>",
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>",
  "format": "text/plain",
  "eventId": "GRB 140311A",
  "editedOn": 1731005792763,
  "bibcode": "2014GCN.15978....1L",
  "circularId": 15978,
  "body": "Owen Littlejohns (ASU), Nat Butler (ASU), Alan M. Watson (UNAM),\nAlexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer\n(UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier Prochaska (UCSC),\nJosh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja\n(GSFC), Enrico Ramirez-Ruiz (UCSC), José A. de Diego (UNAM), Leonid\nGeorgiev (UNAM), Jesús González (UNAM), Carlos Román-Zúñiga (UNAM),\nNeil Gehrels (GSFC), and Harvey Moseley (GSFC) report:\n\nWe observed the field of GRB 140311A (Racusin, et al., GCN 15944) with\nthe Reionization and Transients Infrared Camera (RATIR; www.ratir.org)\non the 1.5m Harold Johnson Telescope at the Observatorio Astronómico\nNacional on Sierra San Pedro Mártir from 2014/03 12.24 to 2014/03 12.36\nUTC (8.75 to 11.51 hours after the BAT trigger), obtaining a total of\n2.10 hours exposure in the r and i bands and 0.89 hours exposure in the\nZ and Y bands.\n\nFor a source within the Swift-XRT error circle (Evans, et al., GCN\n15959), in comparison with the SDSS DR9 and 2MASS, we obtain the\nfollowing detections:\n\n  r     22.33 +/- 0.13\n  i     21.56 +/- 0.08\n  Z     20.58 +/- 0.08\n  Y     20.09 +/- 0.08\n\nThese magnitudes are in the AB system and are not corrected for Galactic\nextinction in the direction of the GRB. The source has faded in comparison\nto observations from other facilities (D'Avanzo et, al., GCN 15953),\nrequiring a power-law with a temporal decay index of alpha = -0.83.\n\nWe thank the staff of the Observatorio Astronómico Nacional in San Pedro\nMártir.",
  "email": "olittlej@asu.edu",
  "createdOn": 1394669491000,
  "subject": "GRB 140311A: RATIR Optical and NIR Detection",
  "version": 2
}