{
  "bibcode": "2014GCN.16471....1S",
  "body": "M. H. Siegel (PSU), N. P. M. Kuin (UCL-MSSL) and E. Sonbas (NASA/GSFC/Adiyaman Univ.)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 140628A\n278 s after the BAT trigger (Sonbas et al., GCN Circ. 16467).\nA source consistent with the XRT position\n(D'Avanzo et al. GCN Circ. 16470)\nis detected in the initial UVOT exposures.\n\nThe preliminary UVOT position is:\n   RA  (J2000) =  02:42:39.88 =  40.66617 (deg.)\n   Dec (J2000) = -00:23:05.7  =  -0.38491 (deg.)\nwith an estimated uncertainty of 0.46 arc sec. (radius, 90% confidence).\n\nPreliminary detections and 3-sigma upper limits using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are: \n\nFilter         T_start(s)   T_stop(s)      Exp(s)           Mag\n\nwhite              278          327           48         17.70 +/- 0.08\nv                 3749         3949          197         19.08 +/- 0.28\nb                 4569         4769          197        >20.2\nu                 4364         4564          197        >19.5\nw1                4159         4359          197        >19.8\nm2                3954         4154          197        >21.2\nw2                9366        10266          886        >21.1\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.03 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 16471,
  "createdOn": 1403991119000,
  "email": "siegel@swift.psu.edu",
  "subject": "GRB 140628A: Swift/UVOT Detection",
  "submitter": "Mike Siegel at PSU/Swift MOC  <siegel@swift.psu.edu>",
  "eventId": "GRB 140628A"
}