{
  "bibcode": "2014GCN.16021....1O",
  "body": "S. R. Oates (UCL-MSSL) and J. K. Cannizzo (NASA/UMBC)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 140320C\n19435 s after the INTEGRAL trigger (Mereghetti et al., GCN Circ. 16007).\nNo optical afterglow consistent with the XRT position \n(Pagani et al., GCN Circ. 16015; 16017) is detected in the initial \nUVOT exposures.\n\nPreliminary 3-sigma upper limits using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nwhite            20211        32984         1056         >22.1\nv                20986        33302         1087         >20.5\nu                19435        37277         1741         >21.4\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.07 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 16021,
  "createdOn": 1395407113000,
  "email": "sro@mssl.ucl.ac.uk",
  "subject": "GRB 140320C: Swift/UVOT Upper Limits",
  "submitter": "Samantha Oates at MSSL  <sro@mssl.ucl.ac.uk>",
  "eventId": "GRB 140320C"
}