GCN Circular 15007
Subject
GRB 130716A: UVOT Upper Limits
Date
2013-07-17T02:01:03Z (11 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>
M. H. Siegel (PSU) and S. Immler (GSFC) report on behalf of the
Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 130716A
120s after the BAT trigger (Cummings et al., GCN Circ. 15006). No
optical afterglow consistent with the XRT position 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) 120 270 147 >20.47
white 888 1038 147 >20.90
v 5858 6057 196 >19.17
b 5242 5442 196 >20.01
u (fc) 334 583 245 >19.86
uvw1 4832 5032 196 >19.61
uvm2 4627 4827 196 >19.64
uvw2 5653 5853 196 >20.05
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.01 in the direction of the burst
(Schlegel et al. 1998).