[vsnet-grb-info 15231] GRB 140705A: Swift/UVOT Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16523
SUBJECT: GRB 140705A: Swift/UVOT Upper Limits
DATE:    14/07/05 21:41:14 GMT
FROM:    Margaret Chester at PSU  <chester at 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. 16520).
No optical afterglow consistent with the XRT position (Osborne et al. 
GCN Circ. 16521) 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).