GCN Circular 18033
Subject
GRB 150716A: Swift/UVOT Upper Limits
Date
2015-07-17T21:08:31Z (9 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>
S. J. LaPorte (PSU) and D. Kocevski (NASA/GSFC/ORAU)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 150716A
86 s after the BAT trigger (Kocevski et al., GCN Circ. 18027).
No optical afterglow consistent with the enhanced XRT position
(Sbarufatti et al. GCN Circ. 18030)
is detected in the initial UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first
finding chart (FC) exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white (fc) 86 213 125 >19.8
white 11701 12468 747 >21.11
v 5994 6193 196 >18.62
b 5378 22713 1512 >20.86
u 6608 6721 111 >19.17
uvw1 6404 6603 196 >19.38
uvm2 6198 6398 196 >19.38
uvw2 5789 5989 196 >19.61
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 1.43 in the direction of the burst
(Schlegel et al. 1998).