A telescope-ready approach for modal compensation of pyramid wavefront sensor optical gain

V. Deo; É. Gendron; G. Rousset; F. Vidal; A. Sevin; F. Ferreira; D. Gratadour; T. Buey

doi:10.1051/0004-6361/201935847

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Volume 629 (September 2019)

A&A, 629 (2019) A107

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Table 3.

H-band SR measurements during and in-between dithering sequences for various r₀ and guide stars, along with mean dithering amplitudes.

SRs in and out of dithering
r₀	M_R	Dith.	10 s	20 msec
cm		Y/N	SR (%)	SR ^(a) (%)	nm RMS ^(b)

14.5	0	N	77.2	76.9 ± 0.9
		Y	77.2	76.9 ± 0.8	5.3
8.5	0	N	34.7	33.0 ± 3.4
		Y	35.2	33.8 ± 3.2	5.9

14.5	16	N	36.6	35.5 ± 3.3
		Y	36.0	35.1 ± 3.1	25.8
8.5	16	N	4.1	2.7 ± 1.1
		Y	4.0	2.9 ± 1.0	25.1

Notes. Dith.: Yes (Y) for data during dithering and No (N) otherwise.

^(a)

Computed from loop residuals with the Maréchal approximation.

^(b)

Averages across the 20 dithering sequences.

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