{
  "bibcode": "2017GCN.21454....1L",
  "body": "GRB 170810A: Swift/UVOT Detection\n\nS. J. LaPorte (PSU) and S. L. Gibson (U. Leicester)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 170810A\n85 s after the BAT trigger (Gibson et al., GCN Circ. 21450).\nA source consistent with the XRT position\n(Goad et al. GCN Circ. 21451)\nis detected in the initial UVOT exposures.\n\nThe preliminary UVOT position is:\n    RA  (J2000) =  12:31:45.33 = 187.93889 (deg.)\n    Dec (J2000) = +03:39:38.9  =   3.66081 (deg.)\nwith an estimated uncertainty of 0.42 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 are: \n\nFilter         T_start(s)   T_stop(s)      Exp(s)           Mag\n\nwhite               85          235          147         14.64 +/- 0.02\nv                  628          648           20         15.88 +/- 0.13\nb                  554          574           20         16.62 +/- 0.10\nu                  299         1493          281        >19.3\nw1                 677         1473           97        >18.9\nw2                 604          623           19        >18.0\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": 21454,
  "createdOn": 1502424283000,
  "email": "sjl5346@psu.edu",
  "subject": "GRB 170810A: Swift/UVOT Detection",
  "submitter": "Sam LaPorte at PSU  <sjl5346@psu.edu>",
  "eventId": "GRB 170810A"
}