{
  "bibcode": "2015GCN.18017....1K",
  "body": "N. P. M. Kuin (UCL-MSSL) and M. G. Bernardini (INAF-OAB) report\non behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 150711A\n117 s after the BAT trigger (Bernardini et al., GCN Circ. 18011).\nNo optical afterglow consistent with the XRT position (Osborne et al.\nGCN Circ. 18012)  is 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           117          267          147         >21.4\nu_FC               330          580          246         >20.2\nwhite              117          909          235         >21.9\nv                  660          852           39         >19.0\nb                  585          778           39         >19.9\nu                  330          753          265         >20.2\nw1                 709          729           19         >18.8\nm2                 684          704           19         >18.9\nw2                 636          828           39         >18.8\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.09 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 18017,
  "createdOn": 1436691959000,
  "email": "npkuin@gmail.com",
  "subject": "GRB 150711A: Swift/UVOT Upper Limits",
  "submitter": "Paul Kuin at MSSL  <npkuin@gmail.com>",
  "eventId": "GRB 150711A"
}