GCN Circular 8262
Subject
GRB 080916C: Swift UVOT Refined Analysis
Event
Date
2008-09-17T17:59:31Z (17 years ago)
From
Erik Hoversten at Swift/Penn State <hoversten@astro.psu.edu>
E. A. Hoversten (PSU), P. Schady (MSSL-UCL), and M. Perri (ASDC)
report on behalf of the Swift UVOT team:
The Swift/UVOT began observations of the field of GRB 080916C 17.0
hours after the Fermi GBM dectection (Goldstein & van der Horst, GCN
8245). No afterglow is detected within the XRT error circle (Evans, et
al., GCN 8255) in any of the observed UVOT filters.
UVOT magnitude 3-sigma upper limits are reported in the following
table:
Filter T_start T_stop Exp(s) Mag (3-sigma upper limit)
-------------------------------------------------------------
v 101253 101857 590 > 19.75
u 96469 97132 645 > 19.99
uvw1 66675 67517 829 > 20.34
uvw1 95562 96462 886 > 20.38
uvm2 61130 66667 1090 > 20.31
uvm2 94655 95555 886 > 20.20
uvw2 100347 101246 886 > 20.43
The quoted upper limits have not been corrected for the large expected
Galactic extinction along the line of sight of E_{B-V} = 0.32 mag
(Schlegel et al., 1998). All photometry is on the UVOT flight system
described in Poole et al. (2008, MNRAS, 383, 627).