MUSE+GALACSI: the first years

Johanna Hartke; Darshan Kakkad; Claudia Reyes; Cristóbal Moya-Sierralta; Axel Reyes; Timo Kravtsov; Johann Kolb; Fernando Selman

doi:10.1117/12.2560793

13 December 2020 MUSE+GALACSI: the first years

Johanna Hartke, Darshan Kakkad, Claudia Reyes, Cristóbal Moya-Sierralta, Axel Reyes, Timo Kravtsov, Johann Kolb, Fernando Selman

Author Affiliations +

Proceedings Volume 11448, Adaptive Optics Systems VII; 114480V (2020) https://doi.org/10.1117/12.2560793
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

The Multi-Unit Spectroscopic Explorer instrument (MUSE), is an integral-field spectrograph at one of the Nasmyth foci of the 8m-class Yepun telescope at Paranal observatory. MUSE's most powerful modes use the Adaptive Optics Facility consisting of a Deformable Secondary Mirror with over 1000 actuators commanded by a real-time computer up to 1000 times per second. At the core of the system are 4 laser guide stars monitored by GALACSI, the wave-front sensor system. MUSE functions with two modes: Wide-Field Mode (1'x1' field), making use of Ground Layer Adaptive Optics and Narrow-Field Mode (7.5"x7.5" field) using full laser tomography. In this work, we will present the results of a campaign to monitor the AO performance as measured by MUSE during the first years of operations. We will evaluate the dependence of this performance, as characterized by the point-spread function, on easily monitored environmental parameters such as ground-layer fraction, coherence time, seeing, and airmass.

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Johanna Hartke, Darshan Kakkad, Claudia Reyes, Cristóbal Moya-Sierralta, Axel Reyes, Timo Kravtsov, Johann Kolb, and Fernando Selman "MUSE+GALACSI: the first years", Proc. SPIE 11448, Adaptive Optics Systems VII, 114480V (13 December 2020); https://doi.org/10.1117/12.2560793

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