{
  "bibcode": "2013GCN.14721....1D",
  "body": "M. De Pasquale (MSSL-UCL) and V. D'Elia (ASDC)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB\n130528A 75 s after the BAT trigger (D'Elia et al., GCN Circ. 14711).\nNo optical afterglow consistent with the enhanced XRT position\n(Goad et al. GCN Circ. 14714) is detected in the initial UVOT\nexposures.\n\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            75          225          147         >20.3\nu_FC               287          537          246         >19.5\nwhite               75        18737         1239         >21.7\nv                  617        11553         1245         >19.9\nb                  543        18247         1356         >20.8\nu                  287        17334         1583         >21.0\nw1                 667        22765         1443         >20.7\nm2                 641        12459         1179         >20.7\nw2                 592         7143          491         >20.5\n\nThe magnitudes in the table are not corrected for the Galactic\nextinction due to the reddening of E(B-V) = 0.16 in the direction\nof the burst (Schlegel et al. 1998).",
  "circularId": 14721,
  "createdOn": 1369838356000,
  "email": "m.depasquale@ucl.ac.uk",
  "subject": "GRB 130528A: Swift/UVOT Upper Limits",
  "submitter": "Massimiliano de Pasquale at MSSL-UCL  <m.depasquale@ucl.ac.uk>",
  "eventId": "GRB 130528A"
}