{
  "bibcode": "2008GCN..8198....1H",
  "body": "S. T. Holland (CRESST/USRA/GSFC) & L. Vetere (PSU) report on behalf of\nthe Swift/UVOT team:\n\n       The Swift/UVOT observed the field of GRB 080906 starting 62 s\nafter the BAT trigger (Vetere et al., 2008, GCNC. 8186).  Settled\nobservations started at T + 82 s.  We detect the optical afterglow\n(Vetere et al., GCNC 8186) in the v, b, u, and white filters.  The\nrefined UVOT source position is\n\n  RA (J2000.0) =  15:12:10.65\nDec (J2000.0) = -80:31:03.2\n\nwith an estimated uncertainty of 0.64 arcsec (radius, 90% confidence).\n\n     Magnitudes and upper limits are reported below.\n\nFilter   TSTART   TSTOP   Exposure     Mag  Err  Comment\n  white       82     182         98   19.71 0.15\n    v        188     588        393   18.61 0.12\n    b        668    6204        216   21.02 0.44\n    u        643    5998        236   20.37 0.34\n   uvw1      619    5793        236  >20.9        2-sigma upper limit\n   uvm2      594    5588        236  >20.5        2-sigma upper limit\n   uvw2      698    6614        235  >21.1        2-sigma upper limit\n\nThe above magnitudes are not corrected for the Galactic extinction\ncorresponding to a reddening of E_{B-V} = 0.30 mag (Schlegel et al.,\n1998, ApJS, 500, 525).  The photometry is on the UVOT photometric\nsystem described in Poole et al. (2008, MNRAS, 383,627).\n\n      The detection in the u filter, coupled with the non-detections in\nthe uvw1, uvm2, and uvw2 filters, are consistent with a redshift of\napproximately z < 2.6.  The power-law decay index in the v band\nbetween 338 and 6719 s is -0.50 +/- 0.04.\n\nPlease update my e-mail address in your Address Book to <Stephen.T.Holland@nasa.gov \n >.\n/\n\\\n/",
  "circularId": 8198,
  "createdOn": 1220824822000,
  "email": "sholland@milkyway.gsfc.nasa.gov",
  "subject": "GRB 080906: Refined Swift/UVOT Observations",
  "submitter": "Stephen Holland at USRA/NASA/GSFC/SSC  <sholland@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 080906"
}