GCN Circular 30025
Subject
GRB 210514A: Swift/UVOT Upper Limits
Date
2021-05-16T15:01:02Z (3 years ago)
From
Alexander Belles at PSU/Swift <aub1461@psu.edu>
A. Belles (PSU) and E. Ambrosi (INAF-IASFPA)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 210514A
80 s after the BAT trigger (Ambrosi et al., GCN Circ. 30008).
No optical afterglow consistent with the XRT position
(Osborne et al., GCN Circ. 30011) 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 80 229 147 >20.85
u_FC 293 543 245 >20.12
white 573 1366 225 >21.00
v 622 1415 97 >18.87
b 548 1342 77 >19.73
u 696 5458 210 >19.99
w1 672 5299 278 >19.59
m2 646 1440 97 >18.41
w2 598 1391 97 >18.52
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.022 in the direction of the burst
(Schlegel et al. 1998).