GCN Circular 28050
Subject
GRB 200630A: Swift/UVOT Upper Limits
Date
2020-07-01T02:15:16Z (4 years ago)
From
Mike Siegel at PSU/Swift MOC <mhs18@psu.edu>
M. H. Siegel (PSU) and K. L. Page (U. Leicester)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 200630A
83 s after the BAT trigger (Page et al., GCN Circ. 28043).
No optical afterglow consistent with the XRT position
(Page et al. GCN Circ. 28043)
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 83 233 147 >19.7
u_FC 295 545 246 >19.8
white 83 1189 353 >20.4
v 624 1239 78 >18.9
b 550 1164 58 >19.6
u 295 5310 433 >20.1
w1 674 5154 253 >20.1
m2 822 4949 232 >20.5
w2 600 1214 78 >20.0
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.04 in the direction of the burst
(Schlegel et al. 1998).