[vsnet-grb-info 12858] Swift GRB130206A: late XRT observations.

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14203
SUBJECT: Swift GRB130206A: late XRT observations.
DATE:    13/02/14 21:58:20 GMT
FROM:    MSSL Swift/UVOT team at MSSL/Swift  <msslba at googlemail.com>

M. De Pasquale (MSSL-UCL), A. Beardmore (Univ. Leicester) report, on behalf

of the Swift team:


The X-ray source described in GCN circ. 14188 (Beardmore et al. 2013) is not

detected anymore in XRT observations performed between 33 and 550 ks after

the trigger, for a total of 35.2 ks of integration time. The 3 sigma upper
limit is

0.00089 count/s, appreciably lower than the count rate observed in previous

observations.


Because of the fading behaviour of this source, we conclude it was likely
the

X-ray afterglow of GRB130206A.


We also note that successive analysis of late data has reduced the error
circle

radius of the source to 4.6'' (90% confidence level).