{
  "bibcode": "2016GCN.19664....1E",
  "body": "S.W.K. Emery (UCL-MSSL) and J. K. Cannizzo (NASA/UMBC)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 160705B\n149 s after the BAT trigger (Cannizzo et al., GCN Circ. 19657).\nNo optical afterglow consistent with the XRT position (Osborne et al. GCN Circ. 19659)\nor the LT and RATIR position (Guidorzi et al. GCN 19658; Watson et al. GCN Circ. 19663)\nis detected in the initial UVOT exposures.\nPreliminary 3-sigma upper limits using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first\nfinding chart (FC) exposure and subsequent exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nwhite_FC           149          298          147         >20.6\nu_FC               307          557          246         >19.9\nwhite             4780         6415          393         >21.0\nv                 5191        11327         1082         >19.9\nb                 6011         6210          197         >20.1\nw1               12239        12529          285         >20.0\nm2               11333        12232          886         >20.7\nw2                6421         6603          179         >19.9\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.01 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 19664,
  "createdOn": 1467838062000,
  "email": "samuel.emery.15@ucl.ac.uk",
  "subject": "GRB 160705B: Swift/UVOT Upper Limits",
  "submitter": "Sam Emery at MSSL-UCL  <samuel.emery.15@ucl.ac.uk>",
  "eventId": "GRB 160705B"
}