GCN Circular 16523

Subject

GRB 140705A: Swift/UVOT Upper Limits

Event

Date

2014-07-05T21:41:14Z (12 years ago)

From

Margaret Chester at PSU <chester@swift.psu.edu>

M. M. Chester (PSU) and M. Stamatikos (OSU/NASA/GSFC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 140705A
65 s after the BAT trigger (Stamatikos et al., GCN Circ. 16520Loading...
 
 ).
No optical afterglow consistent with the XRT position (Osborne et al. 
GCN Circ. 16521Loading...
 
 ) 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            65          215          147         >20.6
u_FC               277          527          246         >20.2
white               65         6023          498         >21.5
v                  607         6434          432         >19.8
b                  532         7088          268         >21.1
u                  277         7048          659         >20.6
w1                 656         6843          432         >20.6
m2                5004         6638          393         >20.9
w2                 582         6229          432         >21.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 4.88 in the direction of the burst
(Schlegel et al. 1998).