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9 July 2008 The SOPHIE spectrograph: design and technical key-points for high throughput and high stability
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SOPHIE is a new fiber-fed echelle spectrograph in operation since October 2006 at the 1.93-m telescope of Observatoire de Haute-Provence. Benefiting from experience acquired on HARPS (3.6-m ESO), SOPHIE was designed to obtain accurate radial velocities (~3 m/s over several months) with much higher optical throughput than ELODIE (by a factor of 10). These enhanced capabilities have actually been achieved and have proved invaluable in asteroseismology and exoplanetology. We present here the optical concept, a double-pass Schmidt echelle spectrograph associated with a high efficiency coupling fiber system, and including simultaneous wavelength calibration. Stability of the projected spectrum has been obtained by the encapsulation of the dispersive components in a constant pressure tank. The main characteristics of the instrument are described. We also give some technical details used in reaching this high level of performance.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. Perruchot, D. Kohler, F. Bouchy, Y. Richaud, P. Richaud, G. Moreaux, M. Merzougui, R. Sottile, L. Hill, G. Knispel, X. Regal, J.-P. Meunier, S. Ilovaisky, H. Le Coroller, D. Gillet, J. Schmitt, F. Pepe, M. Fleury, D. Sosnowska, P. Vors, D. Mégevand, P. E. Blanc, C. Carol, A. Point, A. Laloge, and J.-C. Brunel "The SOPHIE spectrograph: design and technical key-points for high throughput and high stability", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70140J (9 July 2008);


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