Performance of the CHIRON high-resolution Echelle spectrograph

Christian Schwab; Julien F. P. Spronck; Andrei Tokovinin; Andrew Szymkowiak; Matthew Giguere; Debra A Fischer

doi:10.1117/12.925108

24 September 2012 Performance of the CHIRON high-resolution Echelle spectrograph

Christian Schwab, Julien F. P. Spronck, Andrei Tokovinin, Andrew Szymkowiak, Matthew Giguere, Debra A Fischer

Proceedings Volume 8446, Ground-based and Airborne Instrumentation for Astronomy IV; 84460B (2012) https://doi.org/10.1117/12.925108
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

CHIRON is a fiber-fed Echelle spectrograph with observing modes for resolutions from 28,000 to 120,000, built primarily for measuring precise radial velocities (RVs). We present the instrument performance as determined during integration and commissioning. We discuss the PSF, the effect of glass inhomogeneity on the cross-dispersion prism, temperature stabilization, stability of the spectrum on the CCD, and detector characteristics. The RV precision is characterized, with an iodine cell or a ThAr lamp as the wavelength reference. Including all losses from the sky to the detector, the overall efficiency is about 6%; the dominant limitation is coupling losses into the fiber due to poor guiding.

Citation Download Citation

Christian Schwab, Julien F. P. Spronck, Andrei Tokovinin, Andrew Szymkowiak, Matthew Giguere, and Debra A Fischer "Performance of the CHIRON high-resolution Echelle spectrograph", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84460B (24 September 2012); https://doi.org/10.1117/12.925108

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