GCN Circular 27944
Subject
GRB 200613A: Swift/UVOT Detection
Date
2020-06-14T17:02:42Z (4 years ago)
From
Frank Marshall at Swift/UVOT <marshall@milkyway.gsfc.nasa.gov>
F. E. Marshall (NASA/GSFC)
reports on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 200613A
43621 s after the FERMI/LAT trigger (Ohno et al., GCN Circ. 27931).
A source consistent with the XRT position (Kennea et al., GCN Circ. 27936)
is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 10:12:10.03 = 153.04178 (deg.)
Dec (J2000) = +45:45:14.1 = 45.75391 (deg.)
with an estimated uncertainty of 0.46 arc sec. (radius, 90% confidence).
This position is consistent with the optical counterparts
reported by Kann et al. (GCN Circ. 27935 & 27938) and
Pozanenko (GCN Circ. 27937).
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 44416 45204 775 19.65 +/- 0.07
v 45211 45427 213 >18.6
u 43621 44409 775 19.02 +/- 0.12
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.01 in the direction of the burst
(Schlegel et al. 1998).