{
  "bibcode": "2013GCN.14339....1S",
  "body": "C. A. Swenson (PSU) and T. N. Ukwatta (MSU)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 130327A\n104 s after the BAT trigger (Ukwatta et al., GCN Circ. 14331).\nNo optical afterglow consistent with the XRT position\n(Osborne et al. GCN Circ. 14335)\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           104          254          147         >21.2\nu_FC               317          567          246         >20.0\nwhite              104         6491          727         >21.8\nv                  646         6877          428         >19.8\nb                  572         6286          432         >20.7\nu                  317         6081          659         >20.4\nw1                 695        12014         1111         >21.6\nm2                 671        11107         1141         >21.0\nw2                 622         6696          452         >21.9\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.13 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 14339,
  "createdOn": 1364394155000,
  "email": "cswenson@astro.psu.edu",
  "subject": "GRB 130327A: Swift/UVOT Upper Limits",
  "submitter": "Craig Swenson at PSU/Swift  <cswenson@astro.psu.edu>",
  "eventId": "GRB 130327A"
}