{
  "bibcode": "2009GCN..9990....1P",
  "body": "T. A. Pritchard (PSU) , E.A. Hoversten (PSU), and\nR.L.C. Starling (U. Leicester) report on behalf of the\nSwift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of\nGRB 091003 approximately 15.5 hours after the FERMI/GBM Trigger (Rau,\nGCN Circ. 9983) A faint source is detected with 3.9-sigma confidence\nin the summed UVOT observations at the Swift UVOT-enhanced XRT\nposition (R.L.C. Starling, et al. GCN Circ. 9988).\n\nThe observed magnitudes and upper limits using the UVOT photometric\nsystem (Poole etal. 2008, MNRAS, 383, 627) for the initial exposures\nare:\n\nFilter   T_start(s)   T_stop(s)   Exp(s)          Mag\n=======================================================================\nw2        56820        64169    1150     21.08 � 0.28 (3.9 sigma)\nw1       103712       104474     750     20.70 � 0.32 (3.4 sigma)\nb         92252        92954     685     20.80 � 0.26 (4.1 sigma)\n\nm2\t  98013        98715     691     > 21.63\nv         86432        87195     741     > 20.27\n\nThe values quoted above are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.02 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 9990,
  "createdOn": 1254699768000,
  "email": "tapritchard@astro.psu.edu",
  "subject": "GRB 091003: Swift/UVOT Detection of an Optical Afterglow",
  "submitter": "Tyler Pritchard at PSU  <tapritchard@astro.psu.edu>",
  "eventId": "GRB 091003"
}