On-sky results of the adaptive optics MACAO for the new IR-spectrograph
  CRIRES at VLT

Biereichel, P.; Delabre, B.; Donaldson, R.; Esteves, R.; Fedrigo, E.; Gigan, P.; Gojak, D.; Hubin, N.; Kaeufl, U.; Kasper, M.; Lizon, JL.; Marchetti, E.; Oberti, S.; Paufique, J.; Pirard, JF.; Pozna, E.; Santos, J.; Stroebele, S.; Tordo, S.

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On-sky results of the adaptive optics MACAO for the new IR-spectrograph CRIRES at VLT

Authors: P. Biereichel
B. Delabre
R. Donaldson
R. Esteves
E. Fedrigo
P. Gigan
D. Gojak
N. Hubin
U. Kaeufl
M. Kasper
JL. Lizon
E. Marchetti
S. Oberti
J. Paufique
JF. Pirard
E. Pozna
J. Santos
S. Stroebele
S. Tordo
Publication date: 24 May 2006
Publisher: 'SPIE-Intl Soc Optical Eng'
Doi

Abstract

The adaptive optics MACAO has been implemented in 6 focii of the VLT observatory, in three different flavors. We present in this paper the results obtained during the commissioning of the last of these units, MACAO-CRIRES. CRIRES is a high-resolution spectrograph, which efficiency will be improved by a factor two at least for point-sources observations with a NGS brighter than R=15. During the commissioning, Strehl exceeding 60% have been observed with fair seeing conditions, and a general description of the performance of this curvature adaptive optics system is done.Comment: SPIE conference 2006, Advances in adaptive optics, 12 pages, 11 figure