{
  "bibcode": "2014GCN.16460....1K",
  "body": "N. P. M. Kuin (UCL-MSSL) and J. R. Cummings (NASA/UMBC)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 140626A\n103 s after the BAT trigger (Cummings et al., GCN Circ. 16456).\nNo optical afterglow consistent with the XRT position\n(Beardmore et al. GCN Circ. 16459)\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           103          253          147         >20.9\nu_FC               262          511          246         >20.3\nwhite              103         1538          392         >21.1\nv                  592         1590          117         >19.0\nb                  517         1514           97         >20.0\nu                  262         1489          343         >20.4\nw1                 642         1639          117         >19.4\nm2                 617         1440           39         >19.1\nw2                 568         1563          117         >19.9\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.15 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 16460,
  "createdOn": 1403786667000,
  "email": "npkuin@gmail.com",
  "subject": "GRB 140626A: Swift/UVOT Upper Limits",
  "submitter": "Paul Kuin at MSSL  <npkuin@gmail.com>",
  "eventId": "GRB 140626A"
}