{
  "bibcode": "2018GCN.22912....1B",
  "body": "A. A. Breeveld (UCL-MSSL), S. W. K Emery (UCL-MSSL) and M. Stamatikos \n(OSU/NASA/GSFC) report on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 180705A\n3368 s after the BAT trigger (Stamatikos et al., GCN Circ. 22902).\nNo optical afterglow consistent with the enhanced XRT position (Goad et \nal. GCN Circ. 22906) is 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 finding \nchart (FC) exposure and subsequent exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nwhite_FC          3368         3485          115         >20.2\nwhite             3368         5327          312         >20.8\nv                 4103         5738          393         >18.9\nb                 4923        11649          311         >20.5\nu                 4718        11527         1082         >21.0\nw1                4513        16889          483         >20.5\nm2                4308        15205          647         >20.1\nw2                5333         5533          197         >20.4\n\nThe magnitudes in the table are not corrected for the Galactic \nextinction due to the reddening of E(B-V) = 0.06 in the direction of the \nburst (Schlegel et al. 1998).",
  "circularId": 22912,
  "createdOn": 1530871895000,
  "email": "a.breeveld@ucl.ac.uk",
  "subject": "GRB 180705A: Swift/UVOT Upper Limits",
  "submitter": "Alice Breeveld at MSSL-UCL  <a.breeveld@ucl.ac.uk>",
  "eventId": "GRB 180705A"
}