{
  "bibcode": "2005GCN..3838....1C",
  "body": "M. Chester (PSU), M. Page (UCL-MSSL), P. Roming (PSU),\nF. Marshall (GSFC), P. Boyd (GSFC), L. Angelini (GSFC-JHU),\nJ. Greiner (MPE), N. Gehrels (GSFC), on behalf of the Swift UVOT team.\n\n\nSwift/UVOT began observing GRB050820 at 06:36:13 UT.\nThe initial 100-second finding chart exposure in V was cut short\ndue to entry into the SAA; it was repeated on the second orbit.\n\n\nThe afterglow is detected in the V, B, U, and one UV band.\nSimilar to the ground-based observations (GCN #3829),\nUVOT sees a rising, then falling, light curve in V.\nAnalysis in the other bands is continuing.\n\n\nV-band Observations:\nTime-Since-Trigger       V\n   80 s               18.2 +/- 0.3\n 4635 s               17.6 +/- 0.2\n12238 s               18.2 +/- 0.2\n\n\nOther:\nTime-Since-Trigger    Mag               Filter\n 5647 s                18.3 +/- 0.2       U\n10423 s                19.0 +/- 0.1       B\n 4741 s                20.4 +/- 0.2       UVW1\n11331 s               >21.0               UVW2\n\n\nThe magnitudes have not been corrected for extinction.\nUpper limits are given at the 5-sigma level.",
  "circularId": 3838,
  "createdOn": 1124571852000,
  "email": "chester@astro.psu.edu",
  "subject": "Swift/UVOT photometry of GRB050820",
  "submitter": "Margaret Chester at PSU  <chester@astro.psu.edu>",
  "eventId": "GRB 050820"
}