[vsnet-grb-info 22513] GRB 190519A: Swift/UVOT Upper Limits
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Mon May 20 22:57:28 JST 2019
TITLE: GCN CIRCULAR
NUMBER: 24612
SUBJECT: GRB 190519A: Swift/UVOT Upper Limits
DATE: 19/05/20 13:56:20 GMT
FROM: Jeffrey Gropp at PSU <jdg44 at psu.edu>
J. D. Gropp (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 190519A
150 s after the BAT trigger (Ukwatta et al., GCN Circ. 24595).
No optical afterglow consistent with the enhanced XRT position
(Ukwatta et al. GCN Circ. 24597)
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
u_FC 150 400 246 >18.9
v 456 2571 272 >18.7
b 406 2520 272 >19.7
u 150 2495 646 >19.5
w1 505 2610 262 >19.5
m2 481 2595 272 >19.1
w2 432 2546 272 >19.2
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.42 in the direction of the burst
(Schlegel et al. 1998).
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