{
  "bibcode": "2014GCN.16472....1K",
  "body": "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).  A source\nconsistent with the XRT position (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\nsystem\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures\nare:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)           Mag\n\nwhite              278          327           48         17.43 +/- 0.08\nwhite             3593         4974          300        >21.0\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": 16472,
  "createdOn": 1403992330000,
  "email": "npkuin@gmail.com",
  "subject": "GRB 140628A: Swift/UVOT Detection",
  "submitter": "Paul Kuin at MSSL  <npkuin@gmail.com>",
  "eventId": "GRB 140628A"
}