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GCN Circular 8208

GRB080905A: Swift/UVOT Upper Limits
2008-09-10T13:18:20Z (15 years ago)
Peter Brown at PSU <>
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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