GCN Circular 22733

Subject

GRB 180514A: Swift/UVOT Upper Limits

Event

Date

2018-05-15T06:58:41Z (8 years ago)

From

Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>

A. A. Breeveld (UCL-MSSL) and S. J. LaPorte (PSU) report on behalf of 
the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 180514A 87 
s after the BAT trigger (LaPorte et al., GCN Circ. 22723Loading...
 
 ).
No optical afterglow consistent with the enhanced XRT position (Goad et 
al. GCN Circ. 22725Loading...
 
 ) 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            87          237          147         >20.8
u_FC               300          549          246         >20.2
white               87         7353          688         >22.8
v                 6129         6329          197         >20.1
b                 5513         7148          393         >20.7
u                  300         6943          639         >21.6
w1                5104         6739          393         >20.8
m2                6334         6533          197         >20.1
w2                5924         7540          374         >20.3

The magnitudes in the table are not corrected for the Galactic 
extinction due to the reddening of E(B-V) = 0.01 in the direction of the 
burst (Schlegel et al. 1998).