{
  "bibcode": "2014GCN.16645....1S",
  "body": "M. H. Siegel (PSU) and C. B. Markwardt (NASA/GSFC)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 140730A\n68 s after the BAT trigger (Markwardt et al., GCN Circ. 16642).\nNo optical afterglow consistent with the XRT position\n(Evans GCN Circ. 16643)\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            68          218          147         >21.2\nu_FC               280          530          246         >19.6\nwhite               68         6182          396         >21.3\nv                  784         6593          413         >19.5\nb                  709         5978          216         >20.3\nu                  280         5772          462         >20.0\nw1                 660         5568          236         >21.1\nm2                5162         6798          393         >20.4\nw2                4753         6388          393         >20.6\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.09 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 16645,
  "createdOn": 1406770522000,
  "email": "siegel@swift.psu.edu",
  "subject": "GRB 140730A: Swift/UVOT Upper Limits",
  "submitter": "Mike Siegel at PSU/Swift MOC  <siegel@swift.psu.edu>",
  "eventId": "GRB 140730A"
}