{
  "bibcode": "2013GCN.15266....1H",
  "body": "S. T. Holland (STScI) and\nA. Y. Lien (NASA/GSFC/ORAU)\nreport on behalf of the Swift/UVOT team:\n\n    The Swift/UVOT began settled observations of the field of GRB\n130925A 157 s after the BAT trigger (Lien et al. 2013, GCNC 15246).\nWe do not detect any new source consistent with the GROND afterglow\nposition (Sudilovsky et al. 2013, GCNC 15247) in any of the UVOT\nexposures.  Preliminary 3-sigma upper limits, using the UVOT\nphotometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373),\nfor the finding chart and summed exposures are presented below.\n\n---------------------------------------------------\nFilter        TSTART     TSTOP   Exposure       Mag\n---------------------------------------------------\nwhite (FC)      157        306        147     >21.4\n    u (FC)      315        564        246     >20.6\n---------------------------------------------------\n    v           645       7269        381     >20.0\n    b           571       6121        170     >20.6\n    u           719       5983        274     >20.4\n uvw1          5579     11,956        701     >21.1\n uvm2          5374     11,436       1082     >21.2\n uvw2          4964       7136        393     >20.7\nwhite           595       6929        618     >22.0\n---------------------------------------------------\n\n    The quoted upper limits have not been corrected for the expected\nextinction due to the Galactic reddening along the line of sight to\nthis burst of E(B-V) = 0.02 mag (Schlafly et al. 2011, ApJS, 737,\n103).",
  "circularId": 15266,
  "createdOn": 1380281823000,
  "email": "sholland@stsci.edu",
  "subject": "GRB 130925A: Swift/UVOT Upper Limits",
  "submitter": "Stephen Holland at STScI  <sholland@stsci.edu>",
  "eventId": "GRB 130925A"
}