Resolving asymmetries along the pulsation cycle of the Mira star X Hydrae

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Table 1

Log of the observations.

Date/MJD	Configuration	Calibrator	Coherence time¹ (ms)	Fried parameter¹ (cm)	Frame selection	Integration time (s)/
						calibrated point

Epoch A (Visual Phase: 0.0)

09-01-2010/55205	D0-H0-K0	HR3802	5.3 ± 1.2	2.0 ±0.4	20%	48.5
10-01-2010/55206	D0-G1-H0	HR3802	3.2 ± 0.8	2.2 ± 0.5	40%	97.0

Epoch B (Visual Phase: 0.2)

16-03-2010/55271	D0-H0-K0	HR3802	16.0 ± 6.5	3.0 ± 1.2	35%	85.0
	D0-G1-H0	HR3749	16.0 ± 6.5	3.0 ± 1.2	35%	85.0

Notes.

⁽¹⁾

As an indication on the atmospheric conditions, coherence times and Fried parameters were taken from the DIMM measurements in the visible and are expressed as μ ± 1σ, where μ is the average and σ is the standard deviation computed over each half-night of our observations.

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