GCN Circular 24815
Subject
GRB 190613A: Swift/UVOT Detection
Date
2019-06-13T17:36:46Z (6 years ago)
From
Frank Marshall at Swift/UVOT <marshall@milkyway.gsfc.nasa.gov>
F. E. Marshall (NASA/GSFC) and E. Ambrosi (INAF-IASFPA)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 190613A
145 s after the BAT trigger (Ambrosi et al., GCN Circ. 24798).
A source consistent with the enhanced XRT position
(Osborne et al. GCN Circ. 24809)
is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 12:10:07.01 = 182.52920 (deg.)
Dec (J2000) = +67:14:07.0 = 67.23529 (deg.)
with an estimated uncertainty of 0.43 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 145 295 147 17.88 +/- 0.04
v 634 1061 58 18.63 +/- 0.29
b 560 753 39 18.93 +/- 0.21
u 303 553 246 18.88 +/- 0.11
w1 685 11118 1121 >20.1
m2 5323 6859 296 >20.8
w2 4913 6548 393 >21.5
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.02 in the direction of the burst
(Schlegel et al. 1998).