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Implementation of MACAO for SINFONI at the VLT, in NGS and LGS modes

DOI

64

Citations

0

References

2003

Year

Henri Bonnet, Stefan Ströbele, Fabio Biancat-Marchet, Joar Brynnel, Ralf Conzelmann, Bernard Délabre, Robert H. Donaldson, Jacopo Farinato, Enrico Fedrigo, N. Hubin,
Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Abstract

The European Southern Observatory (ESO) and the Max Planck Institut fur extraterrestrische Physik (MPE) are jointly developing SINFONI, an Adaptive Optics (AO) assisted Near Infrared Integral Field Spectrometer, which will be installed in the first quarter of 2004 at the Cassegrain focus of YEPUN (VLT UT4). The Adaptive Optics Module, a clone of MACAO, designed and built by ESO, is based on a 60 elements curvature system. It feeds the 3D spectrograph, SPIFFI, designed and built by MPE, with higher than 50% K band Strehl for bright (V<12) on-axis Natural Guide Stars (NGS) and less than 35 mas/hour image motion. The AO-Module will be the first curvature AO system operated in Laser Guide Star (LGS) mode, using a STRAP system for the tip/tilt sensing. The Strehl performance in the LGS mode is expected to be better than 30% in K band.