GCN Circular 8208
Subject
GRB080905A: Swift/UVOT Upper Limits
Event
Date
2008-09-10T13:18:20Z (17 years ago)
From
Peter Brown at PSU <pbrown@astro.psu.edu>
P. J. Brown and C. Pagani (PSU) report on behalf of the Swift/UVOT team:
The Swift/UVOT observed the field of GRB 080905A
starting about 114 s after the BAT detection
(Pagani et al., GCN Circ. 8180). We do not detect
any source in the revised XRT error circle (Evans et
al., GCN Circ. 8203) including the faint optical afterglow
seen by Malesani et al. (GCN Circ. 8190)
in any of the UVOT filters down to the following 3 sigma
upper limits (where T_start and T_stop represent the
elapsed time since the BAT trigger in seconds).
Filter T_start(s) T_stop Exp(s) MagLimit
white 114 970 198 >21.3
uvw2 730 750 19 >18.1
uvm2 626 4520 95 >19.2
uvw1 651 825 39 >18.8
u 675 850 39 >19.2
b 700 865 15 >18.9
v 220 1250 1014 >20.6
The above magnitudes are not corrected for the Galactic extinction
corresponding to a reddening of E(B-V) = 0.14 mag (Schlegel et al.,
1998, ApJS, 500, 525). The photometry is on the UVOT photometric
system described in Poole et al. (2008, MNRAS, 383,627).