{
  "bibcode": "2014GCN.16358....1M",
  "body": "F. E. Marshall (NASA/GSFC) and M. C. Stroh (PSU)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 140606A\n68 s after the BAT trigger (Stroh et al., GCN Circ. 16353).\nNo optical afterglow consistent with the BAT position\n(Cummings et al. GCN Circ. 16354)\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         >21.1\nu_FC               280          530          246         >20.4\nwhite               68         6243          746         >21.6\nv                  609         6654          471         >20.2\nb                  535         6039          269         >20.8\nu                  280         5834          442         >20.8\nw1                 833         7064          452         >20.8\nm2                1063         6859          413         >20.6\nw2                1188         6449          413         >20.8\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.01 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 16358,
  "createdOn": 1402090825000,
  "email": "femarsha@khamseen.gsfc.nasa.gov",
  "subject": "GRB 140606A: Swift/UVOT Upper Limits",
  "submitter": "Frank Marshall at GSFC  <femarsha@khamseen.gsfc.nasa.gov>",
  "eventId": "GRB 140606A"
}