GCN Circular 11237
Subject
GRB 100905A: Swift/UVOT Upper Limits
Event
Date
2010-09-06T19:08:45Z (16 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@astro.psu.edu>
M. H. Siegel (PSU) and F. E. Marshall (NASA/GSFC) report on behalf
of the Swift/UVOT team.
The Swift/UVOT began settled observations of the field of
GRB 100905A 77s after the BAT trigger (Marshall et al.,
GCN Circ. 11214). Data summed from the first and second orbits
do not reveal a source at the enhanced position of the X-ray
afterglow (Evans et al., GCN Circ. 11219).
The 3-sigma upper limits for the finding chart (fc) and
summed exposures are reported below:
FILTER T_start(s) T_stop Exposure Mag/3UL
========================================================
white fc 78 228 147 >20.77
white 78 2055 450 >21.29
V 619 1933 155 >19.01
B 545 2031 155 >19.81
u fc 290 540 245 >20.08
u 290 2006 381 >20.17
uvw1 668 1982 155 >19.53
uvm2 5654 7290 393 >20.19
uvw2 5245 12865 1278 >21.26
=======================================================
The above magnitudes are not corrected for the Galactic extinction
corresponding to a reddening of E_{B-V} = 0.06 (Schlegel et al.,
1998, ApJS, 500, 525). The photometry is on the UVOT photometric
system described in Poole et al. (2008, MNRAS, 383, 627).