9 July 2008 The SOPHIE spectrograph: design and technical key-points for high throughput and high stability
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Abstract
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.
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S. Perruchot, S. Perruchot, D. Kohler, D. Kohler, F. Bouchy, F. Bouchy, Y. Richaud, Y. Richaud, P. Richaud, P. Richaud, G. Moreaux, G. Moreaux, M. Merzougui, M. Merzougui, R. Sottile, R. Sottile, L. Hill, L. Hill, G. Knispel, G. Knispel, X. Regal, X. Regal, J.-P. Meunier, J.-P. Meunier, S. Ilovaisky, S. Ilovaisky, H. Le Coroller, H. Le Coroller, D. Gillet, D. Gillet, J. Schmitt, J. Schmitt, F. Pepe, F. Pepe, M. Fleury, M. Fleury, D. Sosnowska, D. Sosnowska, P. Vors, P. Vors, D. Mégevand, D. Mégevand, P. E. Blanc, P. E. Blanc, C. Carol, C. Carol, A. Point, A. Point, A. Laloge, A. Laloge, J.-C. Brunel, 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); doi: 10.1117/12.787379; https://doi.org/10.1117/12.787379
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