{
  "bibcode": "2018GCN.22733....1B",
  "body": "A. A. Breeveld (UCL-MSSL) and S. J. LaPorte (PSU) report on behalf of \nthe Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 180514A 87 \ns after the BAT trigger (LaPorte et al., GCN Circ. 22723).\nNo optical afterglow consistent with the enhanced XRT position (Goad et \nal. GCN Circ. 22725) 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            87          237          147         >20.8\nu_FC               300          549          246         >20.2\nwhite               87         7353          688         >22.8\nv                 6129         6329          197         >20.1\nb                 5513         7148          393         >20.7\nu                  300         6943          639         >21.6\nw1                5104         6739          393         >20.8\nm2                6334         6533          197         >20.1\nw2                5924         7540          374         >20.3\n\nThe magnitudes in the table are not corrected for the Galactic \nextinction due to the reddening of E(B-V) = 0.01 in the direction of the \nburst (Schlegel et al. 1998).",
  "circularId": 22733,
  "createdOn": 1526367521000,
  "email": "a.breeveld@ucl.ac.uk",
  "subject": "GRB 180514A: Swift/UVOT Upper Limits",
  "submitter": "Alice Breeveld at MSSL-UCL  <a.breeveld@ucl.ac.uk>",
  "eventId": "GRB 180514A"
}