{
  "bibcode": "2008GCN..7763....1H",
  "body": "S. T. Holland (CRESST/USRA/GSFC) reports on behalf of the Swift/UVOT\nteam:\n\n      The Swift/UVOT began settled observations the field of GRB 080516\nstarting 81 s after the BAT trigger (Holland et al., GCN Circ. 7733).\nWe do not detect the GROND optical afterglow reported by Filgas et al.\n(2008a, GCN Circ. 7740) in any of the UVOT data.  The ground-based\nposition of the afterglow is 10.6 arcsec from the USNO-B1.0 star\n638-018182, which has a magnitude of B = 12.  The afterglow is located\nin the scattered light halo, and in the coincidence loss pattern of\nthis star, which makes our photometry somewhat uncertain.\n\n      Upper limits from the coadded data are reported below.\n\nFilter    T_start (s) T_stop  Exposure   Mag    Comment\n    v           81     41,277    2950   >21.1    3-sigma UL\n    b          560     47,700    2243   >22.2    3-sigma UL\n    u          536     47,184    4409   >22.3    3-sigma UL\n  uvw1         511     46,278    4913   >22.1    3-sigma UL\n  uvm2         486     41,915    3648   >22.1    3-sigma UL\n  uvw2         576     40,364    2223   >21.8    3-sigma UL\n\nThese upper limits are not corrected for the Galactic extinction along\nthe line of sight to the source corresponding to a reddening of\nE_{B-V} = 0.40 mag (Schlegel et al., 1998, ApJS, 500, 525).  The\nphotometry is on the UVOT flight system described in Poole et\nal. (2008, MNRAS, 383,627).",
  "circularId": 7763,
  "createdOn": 1211468228000,
  "email": "sholland@milkyway.gsfc.nasa.gov",
  "subject": "GRB 80516: Swift/UVOT Observations",
  "submitter": "Stephen Holland at USRA/NASA/GSFC/SSC  <sholland@milkyway.gsfc.nasa.gov>"
}