[vsnet-grb-info 24907] GRB 200205B: Swift/UVOT Detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Fri Feb 7 11:48:35 JST 2020
TITLE: GCN CIRCULAR
NUMBER: 27006
SUBJECT: GRB 200205B: Swift/UVOT Detection
DATE: 20/02/07 02:46:45 GMT
FROM: Kira Simpson at PSU <kira.simpson1984 at gmail.com>
GRB 200205B: Swift/UVOT Detection
K. K. Simpson (PSU) and P. A. Evans (U. Leicester)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 200205B
352 s after the BAT trigger (Evans et al., GCN Circ. 26993).
A source consistent with the XRT position
(Evans et al. GCN Circ. 26993)
is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 07:11:09.15 = 107.78812 (deg.)
Dec (J2000) = -56:29:15.3 = -56.48759 (deg.)
with an estimated uncertainty of 0.42 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 6386 6586 196 18.92+-0.10
white 383 1042 478 16.81+-0.03
v 540 733 38 16.88 +/-
0.17
b 638 833 38 17.74 +/-
0.15
u 614 808 38 17.25 +/-
0.16
w1 589 783 38 16.88+-0.20
m2 564 758 38 17.12 +/- 0.28
w2 689 1056 46 >17.77
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.11 in the direction of the burst
(Schlegel et al. 1998).
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