10 July 2018 4MOST metrology system error analysis
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The 4-metre Multi-Object Spectroscopic Telescope (4MOST) instrument uses 2436 individually positioned optical fibres to couple the light of targets into its spectrographs. The metrology system determines the position of the back-illuminated fibres on the focal surface of the telescope. It consists of 4 identical cameras that are mounted on the spider vanes of the secondary mirror of the VISTA telescope and look through the entire optical train, including M1, M2 and the WFC/ADC unit. Here, we present an exhaustive study on the expected centroiding errors, including but not limited to lens fabrication errors, seeing, mirror distortions and parallax effects.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Roland Winkler, Roland Winkler, Samuel C. Barden, Samuel C. Barden, Allar Saviauk, Allar Saviauk, Steffen Frey, Steffen Frey, Nicolas Azais, Nicolas Azais, Peter Gillingham, Peter Gillingham, Scott Smedley, Scott Smedley, } "4MOST metrology system error analysis", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 1070286 (10 July 2018); doi: 10.1117/12.2313522; https://doi.org/10.1117/12.2313522


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