[vsnet-grb-info 6602] GRB080905A: Swift/UVOT Upper Limits
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Wed Sep 10 22:22:01 JST 2008
TITLE: GCN CIRCULAR
NUMBER: 8208
SUBJECT: GRB080905A: Swift/UVOT Upper Limits
DATE: 08/09/10 13:18:20 GMT
FROM: Peter Brown at PSU <pbrown at 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).
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