16 August 2000 HARPS: a new high-resolution spectrograph for the search of extrasolar planets
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Abstract
HARPS is a high-resolution spectrograph dedicated to the search for extra-solar planets by means of precise radial- velocity measurements. It will be installed on the ESO 3.6-m telescope at the ESO La Silla observatory and should start its operation son end 2002. The observations will provides for many solar-type stars of the solar vicinity a high number of RV measurements with 1 ms-1 accuracy and will allow the detection of Saturn-like planets. The instrument is a fiber-fed and cross-dispersed echelle spectrograph. It has been designed and optimized to measure the Doppler shift of the stellar spectrum by means of cross correction of the spectrum with a numerical mask. For this purpose the entire spectrum in the wavelength range from 380 nm to 680 nm is imaged on a 4k4 mosaic CCD detector at a spectral resolution of about R equals 90,000. Wavelength calibration is provided by a ThAr lamp simultaneously imaged on the CCD. The HARPS spectrograph is also characterized by its high optical efficiency and the high thermo-mechanical stability. Indeed the whole instrument will be temperature controlled and operated in vacuum, in order to assure its short and long-term stability. This paper summarizes the present status of the project and describes the optical and instrument design of HARPS. Also a short presentation of the scientific objectives pursued with HARPS is given by the author.
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Francesco Pepe, Michel Mayor, Bernard Delabre, Dominique Kohler, Daniel Lacroix, Didier Queloz, Stephane Udry, Willy Benz, Jean-Loup Bertaux, Jean-Pierre Sivan, "HARPS: a new high-resolution spectrograph for the search of extrasolar planets", Proc. SPIE 4008, Optical and IR Telescope Instrumentation and Detectors, (16 August 2000); doi: 10.1117/12.395516; http://dx.doi.org/10.1117/12.395516
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KEYWORDS
Spectrographs

Telescopes

Charge-coupled devices

Calibration

Spectral resolution

Stars

Sensors

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