{
  "bibcode": "2013GCN.14268....1B",
  "body": "A. A. Breeveld (MSSL-UCL), Daniele Malesani (DARK/NBI), Bin-Bin Zhang \n(PSU), S. R. Oates (MSSL-UCL) and M. De Pasquale (MSSL-UCL) report on \nbehalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 130305A \n30975s after the BAT trigger discovered in ground analysis (Cummings et \nal., GCN Circ. 14257).\nNo optical afterglow consistent with the XRT position (Malesani et al., \nGCN Circ. 14263) is detected in the initial UVOT exposures. Preliminary \n3-sigma upper limit using the UVOT photometric system (Breeveld et al. \n2011, AIP Conf. Proc. 1358, 373) for the initial exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nu                30975        59030         3890         >21.4\n\nThe magnitudes in the table are not corrected for the Galactic \nextinction due to the reddening of E(B-V) = 0.05 in the direction of the \nburst (Schlegel et al. 1998).",
  "circularId": 14268,
  "createdOn": 1362659653000,
  "email": "a.breeveld@ucl.ac.uk",
  "subject": "GRB 130305A: Swift/UVOT Upper Limit",
  "submitter": "Alice Breeveld at MSSL-UCL  <a.breeveld@ucl.ac.uk>",
  "eventId": "GRB 130305A"
}