20 July 2010 HARPS secondary guiding
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Abstract
The HARPS spectrograph, after its first six years of operations has established itself as the worldwide reference for accurate Doppler measurements. The radial velocity precision of the instrument on a single measurement is estimated around 60 cm/sec. One of the main limitations to the radial velocity precision is the variation of the injection illumination function due to tracking errors. A light and fast guiding system has been recently developed for HARPS. In this way it is expected to increase the guiding closed loop bandwidth by a factor of 10 with respect to the standard guiding performed with the telescope.
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G. Ihle, G. Ihle, G. Avila, G. Avila, I. Kastinen, I. Kastinen, G. Lo Curto, G. Lo Curto, A. Segovia, A. Segovia, P. Sinclaire, P. Sinclaire, R. Tomelleri, R. Tomelleri, } "HARPS secondary guiding", Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77393R (20 July 2010); doi: 10.1117/12.857010; https://doi.org/10.1117/12.857010
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