GCN Circular 8027
Subject
GRB080727A: Swift/UVOT Upper Limits
Event
Date
2008-07-27T14:38:23Z (17 years ago)
From
Wayne Landsman at GSFC/SSAI <wayne.b.landsman@nasa.gov>
W.B. Landsman (NASA/GSFC/Adnet) and S. Immler (PSU) report on behalf of
the Swift/UVOT team:
The Swift/UVOT observed the field of GRB080727A starting 113s after the
BAT trigger (Immler et al., GCN Circ. 8021). We do not find any
source, in any of the UVOT observations, at the UVOT-enhanced XRT
position of the afterglow (Evans et al. GCN Circ. 8025). The 3-sigma
upper limits for detecting a
source at this location in the co-added images are:
Filter T_start T_stop Exp(s) Mag (3-sigma upper limit)
-----------------------------------------------------------------
v 219 7675 1165 >20.6
b 700 7083 471 >20.9
u 675 6878 490 >20.6
uvw1 650 6673 491 >20.5
uvm2 1541 6468 236 >20.0
uvw2 730 7486 471 >20.8
white 113 7284 623 >21.8
-----------------------------------------------------------------
The quoted upper limits have not been corrected for the expected
Galactic extinction along the line of sight corresponding to a
reddening of E_{B-V} = 0.07 mag. All photometry is on the UVOT flight
system described in Poole et al. (2008, MNRAS, 383, 627).