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Table 2

Summary of observations and observing conditions.

Object Filter DIT  ×  NDITa Dither Airmass Obs. date  ⟨EC⟩ c[%]  ⟨τ0⟩ d [ms]
positionsb mean/min/max mean/min/max

HD 97048 H 0.35 s  ×  85 10(12) 1.76–1.68 2006-Apr.-08 42.3/14.9/56.7 5.9/3.7/9.4
Ks 0.35 s  ×  85 8(8) 1.68–1.66 2006-Apr.-08 50.2/41.3/55.9 5.5/2.7/8.1
NB1.64 3.0 s  ×  20 16(16) 1.66–1.74 2006-Apr.-08 53.9/46.2/60.4 7.3/3.0/9.8

Notes.

a

Detector integration time (DIT)  ×  number of integrations (NDIT), i.e., total integration time per dither position and per retarder plate position;

b

Number of dither positions used in final analysis and in parenthesis total number of observed dither position. The difference was disregarded because of poor AO correction. At each dither position NDIT exposures were taken at each of the four different retarder plate positions (0.0°, –22.5°, –45.0°, –67.5°);

c

Average, minimum and maximum value of the coherent energy of the PSF. Calculated by the Real Time Computer of the AO system;

d

Average, minimum and maximum value of the coherence time of the atmosphere. Calculated by the Real Time Computer of the AO system.

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