GCN Circular 8277
Subject
GRB 080919: Swift/UVOT Refined Analysis
Event
Date
2008-09-19T18:17:38Z (17 years ago)
From
Stefan Immler at NASA/GSFC <stefan.m.immler@nasa.gov>
S. Immler (CRESST/GSFC/UMD) and S. T. Holland (CRESST/USRA/GSFC), on
behalf of the Swift Team:
Swift UVOT started observing GRB 080919 (Preger et al. GCN 8270) 82
seconds after the BAT trigger. The source detected by REM (Covino et al.
GCN 8271) is detected in all optical and in the uvw1 filter and shows no
signs of fading over a period of ~25 ks after the trigger. It is the
only optical source detected within the XRT error circle (Preger et al.
GCN 8276). The following UVOT magnitudes (and 3-sigma upper limits) are
measured:
Filter T_start T_stop Exp(s) Mag (3-sigma upper limit)
-----------------------------------------------------
white 82 18561 2,203 18.4�0.1
v 188 23441 2,766 17.2�0.1
b 670 17648 1,375 18.3�0.1
u 645 7509 510 19.6�0.3
uvw1 620 25158 1,301 20.4�0.5
uvm2 594 24347 1,278 >20.4
uvw2 701 19375 1,809 >20.8
The quoted upper limits have not been corrected for the expected
Galactic extinction along the line of sight of E(B-V) of 0.49 mag
(Schlegel et al. 1998). All photometry is on the UVOT flight system
described in Poole et al. (2008, MNRAS, 383, 627).