GCN Circular 7881
Subject
GRB080613A: Swift/UVOT Upper Limits
Date
2008-06-14T02:43:26Z (17 years ago)
From
Erik Hoversten at Swift/Penn State <hoversten@astro.psu.edu>
E. A. Hoversten (PSU) and S. T. Holland (CRESST/USRA/GSFC) on behalf
of the Swift/UVOT team.
The Swift Ultra-Violet/Optical Telescope (UVOT) began settled
observations of the INTEGRAL-detected GRB 080613A (Gotz, et al., GCN
Circ. 7871) 6.7 hours after the trigger. No afterglow is detected at the
position of the R-band detection by the Faulkes Telescope North
(Guidorzi, et al., GCN Circ. 7872). The 22.2 magnitude upper limit in
the white band suggests the R~19 object seen by Guidorzi, et al. 3.9
minutes after the trigger has faded and is indeed the afterglow.
Filter T_start(s) T_stop(s) Exp(s) Mag UL (3sig)
white 24725 25189 456 >22.2
v 25195 25638 436 >20.5
b 24257 24720 456 >21.5
The values quoted above are in the UVOT photometric system (Poole et al.
2008, MNRAS, 383, 627). They are not corrected for the expected
Galactic extinction corresponding to a reddening of E(B-V)=0.023 mag in
the direction of the burst (Schlegel et al. 1998).