{
  "bibcode": "2008GCN..8511....1K",
  "body": "N. P. M. Kuin (MSSL/UCL) and S. Immler (CRESST/GSFC/UMD) report on behalf\nof the Swift UVOT team.\n\nThe Swift UltraViolet/Optical Telescope (UVOT) began observing GRB 081109B\n(Swift BAT trigger number 334129; Immler et al., GCN Circ. 8502) on\nNovember 9, 2008, at 13:50:24 UT, 187 seconds after the trigger.\n\nNo new source is detected in any of our images or summed images which\ncover the BAT error circle descibed in GCN Circ. 8502.\n\nThe 5-sigma upper limits in the summed images for GRB081109B at a random\nbackground position within the BAT error circle are given below:\n\nFilter Tstart(s) Tstop(s)  Exp(s)  Magnitude\n\nwh     187       5946     560      >20.78 (5-sigma UL)\nu      393      12195     533      >20.1  (5-sigma UL)\nb      418       5741     235      >19.9  (5-sigma UL)\nuvw2   468       6152     413      >19.8  (5-sigma UL)\nv      492       6357     413      >19.3  (5-sigma UL)\nuvm2   344      10975    1142      >20.2  (5-sigma UL)\nuvw1   369      11882    1121      >20.5  (5-sigma UL)\n\nThe values quoted above are on the UVOT Photometric System (Poole et al,\n2008, MNRAS 383, 627). They are not corrected for the expected galactic\nreddening of E(B-V) = 0.01 in the direction of the burst (Schlegel et al. 1998).",
  "circularId": 8511,
  "createdOn": 1226316001000,
  "email": "npkuin@googlemail.com",
  "subject": "GRB 081109B: Swift/UVOT refined analysis",
  "submitter": "Paul Kuin at MSSL  <npkuin@googlemail.com>",
  "eventId": "GRB 081109B"
}