GCN Circular 7901
Subject
GRB080623: Swift UVOT followup observations
Date
2008-06-23T20:43:04Z (16 years ago)
From
Alice Breeveld at MSSL-UCL <aad@mssl.ucl.ac.uk>
A. A. Breeveld (MSSL/UCL) and T. N. Ukwatta (GSFC/GWU) report on behalf
of the Swift/UVOT team.
The Swift Ultra-Violet/Optical Telescope (UVOT) began settled
observations of GRB 080623 (Ukwatta et al., GCN Circ. 7894) 22.15
minutes after the trigger, as reported in Holland, GCN Circ. 7896. We
confirm that no afterglow is detected at the position of the enhanced
XRT position (Beardmore et al., GCN Circ. 7898) in the initial finding
chart or subsequent summed images.
The following table gives the 3 sigma upper limits in all filters.
Filter T_start(s) T_stop(s) Exp(s) Mag UL (3sig)
white 1329 1428 98.1 >20.4
white 1559 2713 76.9 >20.3
white 8133 8332 196.6 >20.8
v 1436 2598 155.6 >19.0
b 1535 2698 155.5 >19.9
u 1510 2673 155.4 >19.7
uvw1 1486 2648 155.5 >19.4
uvm2 1460 2623 155.6 >19.1
uvw2 1575 2573 136.1 >19.3
The values quoted above are in the UVOT photometric system (Poole et al.
2008, MNRAS, 383, 627). No correction has been made for the large
expected extinction corresponding to E(B-V) of 0.35 mag in
the direction of the burst (Schlegel et al. 1998).