[vsnet-grb-info 15355] GRB 140730A: Swift/UVOT Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16645
SUBJECT: GRB 140730A: Swift/UVOT Upper Limits
DATE:    14/07/31 01:35:22 GMT
FROM:    Mike Siegel at PSU/Swift MOC  <siegel at swift.psu.edu>

M. H. Siegel (PSU) and C. B. Markwardt (NASA/GSFC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 140730A
68 s after the BAT trigger (Markwardt et al., GCN Circ. 16642).
No optical afterglow consistent with the XRT position
(Evans GCN Circ. 16643)
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            68          218          147         >21.2
u_FC               280          530          246         >19.6
white               68         6182          396         >21.3
v                  784         6593          413         >19.5
b                  709         5978          216         >20.3
u                  280         5772          462         >20.0
w1                 660         5568          236         >21.1
m2                5162         6798          393         >20.4
w2                4753         6388          393         >20.6

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.09 in the direction of the burst
(Schlegel et al. 1998).