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Table 2

Parameters of X Sgr companion, and LD diameters.

Δx [mas] Δy [mas] r2 [mas] f

8.00  ±  0.02 E 7.15  ±  0.04 S  <0.5 (6 ± 1) × 10-3

Phasea Date θLD [mas]

0.83 2011 May 03 1.47 ± 0.01 ± 0.04
0.54 2011 Apr. 24 1.36 ± 0.09 ± 0.04
0.35 2012 Mar. 31b 1.59 ± 0.08 ± 0.04

Notes. Random errors (first ones) and systematics (second ones) are distinguished.

(a)

The pulsation phase was estimated using the formula provided by Szabados (1989) for constraining the pulsation period and the epoch of maximum of the different data sets.

(b)

For the 2012 Mar. 31 night a pure LD model is adopted, given the undetermined binary parameters.

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