{
  "bibcode": "2005GCN..3039....1S",
  "body": "P. Schady (MSSL), M. Ivanushkina (PSU), T. Poole (MSSL), C. Gronwall (PSU), \nA. Blustin (MSSL), P. Brown (PSU), S. Rosen, K. McGowan, M. De Pasquale \n(MSSL), P. Boyd (GSFC/UMBC), S. Holland, M. Still (GSFC/USRA), W. Landsman \n(GSFC), S. Hunsberger (PSU), A. Breeveld (MSSL), P. Roming (PSU), K. Mason, \nH. Huckle (MSSL), P. Broos (PSU), T. Kennedy, P. Smith, B. Hancock (MSSL), \nS. Koch (PSU), M. Carter (MSSL),  J. Racusin (PSU), E. Fenimore (LANL), B. \nZhang (UNLV), J. Nousek (PSU), N. Gehrels (GSFC), on behalf of the Swift \nUVOT team.\n\nThe Swift Ultra-Violet/Optical Telescope (UVOT) began observations of \nGRB050219a on February 19, 2005, at 12:41:21 UT, 80 seconds after the \ninitial Swift BAT trigger (Hullinger et al, GCN 3038).  We detect no source \nat the Swift XRT position (Romano et al, GCN 3036).  The limiting \nmagnitudes in each of the UVOT filters are as follows:\n\n  UVW2 ~ 21.0 (3-sigma) for a combined 277 second exposure starting @ 80 \nseconds after the burst\n  UVM2 ~ 20.8 (3-sigma) for a combined 277 second exposure starting @ 201 \nseconds after the burst\n  UVW1 ~ 21.7 (3-sigma) for a combined 287 second exposure starting @ 216 \nseconds after the burst\n  U ~ 21.6 (3-sigma) for a combined 280 second exposure starting @ 230 \nseconds after the burst\n  B ~ 21.5 (3-sigma) for a combined 278 second exposure starting @ 245 \nseconds after the burst\n  V ~ 20.7 (3-sigma) for a combined 374 second exposure starting @ 96 \nseconds after the burst\n\nWe caution that the instrument is not yet fully calibrated and that the \nmagnitude limits presented here may need to be refined.",
  "circularId": 3039,
  "createdOn": 1108853216000,
  "email": "roming@astro.psu.edu",
  "subject": "GRB050219a: No Swift UVOT Detection of Afterglow Emission",
  "submitter": "Pete Roming at PSU  <roming@astro.psu.edu>",
  "eventId": "GRB 050219A"
}