{
  "bibcode": "2014GCN.16293....1K",
  "body": "N. P. M. Kuin (UCL-MSSL) and Bernardini (INAF-OAB) report on\nbehalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 140516A\n84 s after the BAT trigger (Bernardini et al., GCN Circ. 16285).\nNo optical afterglow consistent with the XRT enhanced position\n(Osborne et al. GCN Circ. 16289) is detected in the initial UVOT\nexposures. The Enhanced position overlaps with the PSF wings of\na star, and the light curve is consistent with a constant source.\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            84          234          147         >20.5\nu_FC               298          547          246         >21.2\nwhite               84        12686         1178         >20.6\nv                  627         7762          607         >19.5\nb                  553        12381         1294         >20.9\nu                  298         8313          770         >21.0\nw1                 676         8172          607         >21.6\nm2                 651         7967          529         >21.0\nw2                 602         7558          607         >21.1\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.02 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 16293,
  "createdOn": 1400329403000,
  "email": "npkuin@gmail.com",
  "subject": "GRB 140516A: Swift/UVOT Upper Limits",
  "submitter": "Paul Kuin at MSSL  <npkuin@gmail.com>",
  "eventId": "GRB 140516A"
}