GCN Circular 24955
Subject
GRB 190701A: Swift/UVOT Upper Limits
Event
Date
2019-07-01T22:18:53Z (7 years ago)
From
Mike Siegel at PSU/Swift MOC <mhs18@psu.edu>
M. H. Siegel (PSU) and T. N. Ukwatta (LANL)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 190701A
145 s after the BAT trigger (Ukwatta et al., GCN Circ. 24934).
No optical afterglow consistent with the enhanced XRT position
(Osborne et al. GCN Circ. 24940)
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 145 295 147 >20.3
u_FC 303 553 246 >19.8
white 145 6776 727 >21.2
v 629 11104 409 >19.3
b 559 6570 432 >20.6
u 303 6365 659 >20.6
w1 677 6160 432 >19.9
m2 652 5955 432 >19.3
w2 610 10926 1158 >20.2
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.59 in the direction of the burst
(Schlegel et al. 1998).