{
  "bibcode": "2008GCN..8262....1H",
  "body": "E. A. Hoversten (PSU), P. Schady (MSSL-UCL), and M. Perri (ASDC)\nreport on behalf of the Swift UVOT team:\n\nThe Swift/UVOT began observations of the field of GRB 080916C 17.0\nhours after the Fermi GBM dectection (Goldstein & van der Horst, GCN\n8245). No afterglow is detected within the XRT error circle (Evans, et\nal., GCN 8255) in any of the observed UVOT filters.\n\nUVOT magnitude 3-sigma upper limits are reported in the following\ntable:\n\nFilter   T_start   T_stop   Exp(s)  Mag (3-sigma upper limit)\n-------------------------------------------------------------\nv         101253   101857     590        > 19.75\nu          96469    97132     645        > 19.99\nuvw1       66675    67517     829        > 20.34\nuvw1       95562    96462     886        > 20.38\nuvm2       61130    66667    1090        > 20.31\nuvm2       94655    95555     886        > 20.20\nuvw2      100347   101246     886        > 20.43\n\nThe quoted upper limits have not been corrected for the large expected\nGalactic extinction along the line of sight of E_{B-V} = 0.32 mag\n(Schlegel et al., 1998).  All photometry is on the UVOT flight system\ndescribed in Poole et al. (2008, MNRAS, 383, 627).",
  "circularId": 8262,
  "createdOn": 1221674371000,
  "email": "hoversten@astro.psu.edu",
  "subject": "GRB 080916C: Swift UVOT Refined Analysis",
  "submitter": "Erik Hoversten at Swift/Penn State  <hoversten@astro.psu.edu>",
  "eventId": "GRB 080916C"
}