GCN Circular 8308
Subject
GRB 081001: Swift UVOT Observations
Event
Date
2008-10-02T17:29:21Z (18 years ago)
From
Erik Hoversten at Swift/Penn State <hoversten@astro.psu.edu>
E. A. Hoversten (PSU), and H.A. Krimm (CRESST/GSFC/USRA) report on
behalf of the Swift UVOT team:
The Swift/UVOT began observations of the field of GRB 081001 14.5 ks
after the SuperAGILE dectection (Lazzarotto et al., GCN
Circ. 8305). No afterglow is detected within the Swift XRT error
circle (Page et al., GCN 8307) in any of the observed UVOT filters.
UVOT magnitude 3-sigma upper limits are reported in the following
table:
Filter T_start T_stop Exp(s) Mag (3-sigma upper limit)
-------------------------------------------------------------
v 16285 22214 350 > 19.84
b 15213 21209 416 > 20.90
u 14997 20992 416 > 20.51
uvw1 14568 20776 834 > 20.84
uvm2 16502 16696 191 > 19.81
uvw2 15431 22064 1670 > 21.65
The quoted upper limits have not been corrected for the large expected
Galactic extinction along the line of sight of E(B-V) = 2.63 mag
(Schlegel et al., 1998). All photometry is on the UVOT photometry system
described in Poole et al. (2008, MNRAS, 383, 627).