[vsnet-grb-info 15248] GRB 140703A: Swift/UVOT Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16540
SUBJECT: GRB 140703A: Swift/UVOT Upper Limits
DATE:    14/07/07 23:45:44 GMT
FROM:    Mike Siegel at PSU/Swift MOC  <siegel at swift.psu.edu>

M. H. Siegel (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 140703A
123 s after the BAT trigger (Kocevski et al., GCN Circ. 16503).
No optical afterglow consistent with the XRT position
(Kocevski et al. GCN Circ. 16503)
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           123          239          114         >19.7
white              123         5830          507         >20.5
v                 4606         4806          197         >19.3
b                 3991         5626          393         >20.2
u                 3785         5420          393         >20.1
w1                5016         5216          197         >19.7
m2                4811         5010          197         >20.2
w2                4401         6002          359         >20.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.10 in the direction of the burst
(Schlegel et al. 1998).