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GCN Circular 14188

GRB 130206A: XRT and UVOT follow-up observations.
2013-02-07T20:22:53Z (11 years ago)
MSSL Swift/UVOT team at MSSL/Swift <>
Andy Beardmore (Univ. Leicester), A. Breeveld (MSSL-UCL) and M. De
Pasquale (MSSL-UCL) on behalf of the Swift team, report:

The Swift-XRT began observing the field of GRB130206A (De Pasquale et al.,
GCN Circ. 14181) in photon counting  mode at 2013-02-06 20:28 UT, 3090 s
after the trigger. In 10.3 ks of data we find a faint source at RA, Dec =
140.37670, -58.19362 which is equivalent to

RA  (J2000) = 09h 21m 30.41s
Dec (J2000) = -58d 11' 37.0"

with an uncertainty of 5.6 arcseconds (radius, 90% confidence). The
source is located 20 arcseconds from the BAT refined position
(Stamatikos et al, GCN Circ, 14186), within the BAT error circle.

The source is detected at a count rate of 0.0017 �� 0.0006 count/s. We
cannot tell if it is fading at this time.

The Swift/UVOT began settled observations of the field of GRB130206A
3081 s after the BAT trigger.
No optical afterglow consistent with the XRT position 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
(FC) exposure and subsequent exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC       3081          3231           147         >21.4
white             3081        16409         2114         >23.1
v                   4062        22199         1319         >20.3
b                   3445        15497         1278         >22.3
u                   3239        28222           634         >21.2
w1                4473         27971         1082         >21.0
m2                4268        27065         1312         >20.7
w2                3857         32412         2546         >21.3

The magnitudes in the table are not corrected for the strong Galactic
extinction due to the reddening of E(B-V) = 0.48 in the direction of the
burst (Schlegel et al. 1998).
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