{
  "bibcode": "2009GCN.10245....1M",
  "body": "F. E. Marshall (NASA/GSFC) and E. Troja (NASA/GSFC/ORAU) report on  \nbehalf of the Swift/UVOT team:\n\nAfter a relatively flat initial decay, the light curve of\nthe optical afterglow of GRB 091127 (Smith et al. GCN Circ. 10192;\nImmler & Troja, GCN Circ. 10193) has steepened to a\ndecay index of 1.44 in UVOT observations with the white filter.\nAt 5.2 days after the BAT trigger (Troja et al., GCN Circ. 10191),\nthe white magnitude is 21.8 +/- 0.1.\nSimilar light curves are seen for the UVOT V and U filters.\nThe current decay index is close to that reported\nby Haislip et al. (GCN Circ. 10230) using observations\nbetween 25 and 77 hours after the trigger, and by\nCobb (GCN Circ. 10244) using data from 27.8 to 100.8\nhours after the trigger.\n\nUVOT observations of the afterglow are continuing.",
  "circularId": 10245,
  "createdOn": 1259936878000,
  "email": "marshall@milkyway.gsfc.nasa.gov",
  "subject": "GRB091127: Continuing Swift/UVOT Observations",
  "submitter": "Frank Marshall at GSFC  <marshall@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 091127"
}