GCN Circular 7965
Subject
GRB080710: Swift/UVOT observations
Event
Date
2008-07-10T18:50:43Z (18 years ago)
From
Wayne Landsman at GSFC/SSAI <wayne.b.landsman@nasa.gov>
W.B. Landsman (NASA/GSFC) and B. Sbarufatti(INAF-OAB) report on behalf
of the Swift/UVOT team
The Swift/UVOT observed the field of GRB 08710 starting at 3186s after
the BAT trigger ( Sbarufatti et al., GCN 7957). We detect the afterglow
in all seven UVOT filters at the position
RA(J2000.0) = 00:33:05.65
DEC(J2000.0) = +19:30:05.3
with an estimated uncertainty of 0.5 arcsec (radius, 90% confidence).
This position is consistent with the enhanced XRT position (Evans et al.
GCN 7964) and the KAIT afterglow position (Li et al., GCN 7959). The
detection in the UVW2 (1950 A) filter is consistent with the redshift of
~0.845 estimated from spectroscopic observations by Perley et al. (GCN
7962). The
white and v exposure are consistent with a decay slope of alpha ~-0.8,
as also found by Bersier and Gomboc (GCN 7963).
The magnitudes with 1 sigma errors are reported below.
Filter TMid(s) Expo(s) Magnitude
-----------------------------------------------------
white 3185 98 16.88 +/- 0.02
white 5615 186 17.37 +/- 0.03
v 3342 197 17.06 +/- 0.06
v 10560 295 17.79 +/- 0.08
b 5416 197 17.56 +/- 0.05
u 5211 197 16.70 +/- 0.04
uvw1 5006 197 16.86 +/- 0.06
uvm2 3477 58 17.08 +/- 0.17
uvw2 9344 777 17.88 +/- 0.05
-----------------------------------------------------
The above magnitudes are not corrected for the Galactic extinction
corresponding to a reddening of E{B-V} = 0.07 mag (Schlegel et al.
1998). The photometry is on the UVOT flight system described in Poole
et al. (2008,MNRAS,383,627).