9 August 2016 CARMENES: the VIS channel spectrograph in operation
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Abstract
CARMENES is a fiber-fed high-resolution Echelle spectrograph for the Calar Alto 3.5m telescope. The instrument is built by a German-Spanish consortium under the lead of the Landessternwarte Heidelberg. The search for planets around M dwarfs with a radial velocity of 1 m/s is the main focus of the planned science. Two channels, one for the visible, another for the near-infrared, will allow observations in the complete wavelength range from 550 to 1700 nm. To ensure the stability, the instrument is working in vacuum in a thermally controlled environment. The VIS channel spectrograph is covering the visible wavelength range from 0.55 to 0.95 μm with a spectral resolution of R=93,400 in a thermally and pressure-wise very stable environment. The VIS channel spectrograph started science operation in January 2016. Here we present the opto-mechanical and system design of the channel with the focus on the (re-)integration phase at the observatory and the measured performance during the testing and commissioning periods, including the lessons learned.
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W. Seifert, W. Xu, O. Stahl, H. J. Hagen, M. A. Sánchez Carrasco, G. Veredas, J. A. Caballero, J. Guardia, J. Helmling, L. Hernandez, A. Pérez-Calpena, S. Tulloch, A. Kaminski, M. Zechmeister, A. Quirrenbach, P. J. Amado, I. Ribas, A. Reiners, H. Mandel, "CARMENES: the VIS channel spectrograph in operation", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990865 (9 August 2016); doi: 10.1117/12.2231582; https://doi.org/10.1117/12.2231582
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