{
  "bibcode": "2014GCN.16549....1K",
  "body": "N. P. M. Kuin (UCL-MSSL) and L. M. Z. Hagen (PSU)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 140709A\n93 s after the BAT trigger (Hagen et al., GCN Circ. 16546).  No optical\nafterglow consistent with the XRT position (Evans et al. GCN Circ. 16548)\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            93          242          147         >21.0\nwhite               93         2199          186         >21.3\nv                 2055         5878          216         >19.8\nb                 1979        12414          848         >21.8\nu                  305         6434          330         >20.5\nw1                2104         6288          216         >20.2\nm2                5883         6083          197         >19.9\nw2                2030         2050           19         >19.7\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.40 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 16549,
  "createdOn": 1404906824000,
  "email": "npkuin@gmail.com",
  "subject": "GRB 140709A: Swift/UVOT Upper Limits",
  "submitter": "Paul Kuin at MSSL  <npkuin@gmail.com>",
  "eventId": "GRB 140709A"
}