GCN Circular 18996

K.L. Page (U. Leicester), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), A.
Maselli  (INAF-IASFPA), L.M. McCauley (PSU), J.A. Kennea (PSU), B.
Sbarufatti (INAF-OAB/PSU), C. Pagani (U. Leicester), A.P. Beardmore (U.
Leicester) and P.A. Evans (U. Leicester) report on behalf of the
Swift-XRT team:

Swift-XRT has performed follow-up observations of the MAXI-detected
burst GRB 160206A (Furuya et al. GCN Circ. 18993
Not found
 
 
) in a series of
observations tiled on the sky. The total exposure time is 3.7 ks,
distributed over 4 tiles; the maximum exposure at a single sky location
was 1.6 ks. The data were collected between T0+46.2 ks and T0+53.5 ks,
and are entirely in Photon Counting (PC) mode. 

Two uncatalogued X-ray sources have been detected, however none of them
is above the RASS limit or shows definitive signs of fading. Therefore,
at the present time we cannot identify which, if any, is the afterglow.
Details of these sources are given below:

Source 1:
  RA (J2000.0):  132.7319  =  08:50:55.65
  Dec (J2000.0): -36.3302  =  -36:19:48.5
  Error: 4.1 arcsec (radius, 90% conf.)
  Count-rate: 0.0262 +/- 0.0060 ct s^-1
  Flux: (5.8 +/- 1.3)e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)

Source 2:
  RA (J2000.0):  132.5583  =  08:50:13.98
  Dec (J2000.0): -36.0137  =  -36:00:49.5
  Error: 5.8 arcsec (radius, 90% conf.)
  Count-rate: (5.2 +/- 2.4)e-3 ct s^-1
  Flux: (1.04 +/- 0.49)e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)

The results of the XRT-team automatic analysis of the tiled XRT
observations, including a position-specific upper limit calculator, are
available at http://www.swift.ac.uk/xrt_products/TILED_GRB00053.

This circular is an official product of the Swift-XRT team.