GCN Circular 14928
Subject
GRB 130625A: Swift/UVOT Upper Limits
Event
Date
2013-06-25T20:34:02Z (13 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>
J. S. Linevsky (PSU/CBHS), M. H. Siegel (PSU), and
D. Grupe (PSU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 130625A
102 s after the BAT trigger (Grupe et al., GCN Circ. 14923).
No optical afterglow consistent with the enhanced XRT position
(Grupe et al. GCN Circ. 14924) 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 102 252 147 >20.96
white 595 1890 283 >21.34
v 644 1940 155 >19.34
b 570 1866 136 >20.21
u_FC 315 565 245 >20.26
u 315 2003 617 >20.81
uvw1 694 1989 136 >19.60
uvm2 844 6816 332 >20.04
uvw2 620 1916 155 >19.79
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.22 in the direction of the burst
(Schlegel et al. 1998).