{
  "bibcode": "2009GCN..9946....1G",
  "body": "C. Gronwall and D. Grupe (PSU) report on behalf of the Swift/UVOT team:\n\nIn response to GRB090927 (Swift/BAT trigger 370846) at 10:07:16 UT,\nUVOT took a finding chart exposure of 150 seconds with the White filter\nstarting 2141 seconds after the BAT trigger. There is a candidate  \nafterglow in\nthe rapidly available 2.7'x2.7' sub-image at\nRA(J2000) =\t22:55:53.41 = 343.97255\nDEC(J2000) = -70:58:49.3 = -70.98037\nwith a 90%-confidence error radius of about 0.63 arc sec. This  \nposition is 7.2\narc sec. from the center of the XRT error circle. The estimated  \nmagnitude is\n19.10 with a 1-sigma error of about 0.15. No correction has been made  \nfor the\nexpected extinction corresponding to E(B-V) of 0.03.",
  "circularId": 9946,
  "createdOn": 1254049099000,
  "email": "caryl@astro.psu.edu",
  "subject": "GRB 090927: Swift/UVOT detection of an optical afterglow",
  "submitter": "Caryl Gronwall at PSU/Swift-UVOT  <caryl@astro.psu.edu>",
  "eventId": "GRB 090927"
}