GCN Circular 8365
Subject
GRB 081012: Swift/UVOT analysis of initial observations
Event
Date
2008-10-12T20:33:06Z (18 years ago)
From
Paul Kuin at MSSL <npkuin@googlemail.com>
N. P. M. Kuin (MSSL/UCL) and M.C. Stroh (PSU) report on behalf of
the Swift UVOT team.
The Swift UltraViolet/Optical Telescope (UVOT) began observations of
GRB081012 (Swift BAT trigger number 331475, Stroh et al., GCN Circ.
8361), on October 12, 2008, at 14:02:28 ,52 minutes after the
trigger.
We do not detect any new source at the XRT position reported in GCN
Circ. 8364 (Kennea et al.).
The magnitude upper limits for detecting GRB081012 at the XTR position
are given below for the first observations in the UVOT filters:
Filter Tstart(s) Tstop(s) Exp(s) Magnitude
uvw2 3125 3325 196.6 >20.09 (3-sigma UL)
v 3329 3458 125.8 >19.12 (3-sigma UL)
uvm2 4876 5076 196.6 >19.72 (3-sigma UL)
uvw1 5082 5282 196.6 >19.94 (3-sigma UL)
u 5287 5487 196.6 >20.00 (3-sigma UL)
b 5492 5692 196.6 >20.33 (3-sigma UL)
wh 5697 5713 15.7 >19.42 (3-sigma UL)
The values quoted above are on the UVOT Photometric System
(Poole et al, 2008, MNRAS 383,627). They are not corrected for the
expected galactic reddening of E(B-V) = 0.023 in the direction of
the burst (Schlegel et al. 1998).