{
  "bibcode": "2018GCN.23498....1S",
  "body": "M. H. Siegel (PSU) and J. K. Cannizzo (NASA/UMBC)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 181202A\n86 s after the BAT trigger (Cannizzo et al., GCN Circ. 23482).\nA source consistent with the XRT position\n(Evans et al. GCN Circ. 23483)\nis detected in the initial UVOT exposures.\n\nThe preliminary UVOT position is:\n  RA  (J2000) =  18:42:56.38 = 280.73491 (deg.)\n  Dec (J2000) = +27:57:35.0  =  27.95971 (deg.)\nwith an estimated uncertainty of 0.47 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\nv                  623         1540          117        >18.7\nb                  342          591          246         19.57 +/- 0.18\nu (fc)              86          336          246         17.67 +/- 0.07\nw1                 672         1441           97        >19.6\nm2                 647         1560          112        >22.2\nw2                 598         1516          117        >20.5\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.14 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 23498,
  "createdOn": 1543882197000,
  "email": "mhs18@psu.edu",
  "subject": "GRB 181202A: Swift/UVOT Detection",
  "submitter": "Mike Siegel at PSU/Swift MOC  <mhs18@psu.edu>",
  "eventId": "GRB 181202A"
}