| HARPS, a new high-resolution spectrograph for the search of extra-solar planets (2007) | |||||||||||||
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| HARPS (High-Accuracy Radial-velocity Planetary Search) is a high-resolution spectrograph dedicated to the search for extra-solar planets by means of precise radial-velocity (RV) measurements. It will be installed on the ESO 3.6-m telescope at the ESO La Silla observatory and should start its operations on end 2002. The observations will provide for many solar-type stars of the solar vicinity a high number of RV measurements with 1 ms \Gamma1 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 correlation of the spectrum with a numerical mask. For this purpose the entire spectrum in the wavelength range from 380nm to 680nm is imaged on a 4k4 mosaic CCD detector at a spectral resolution of about R=90'000. Wavelength calibration is provided by a ThAr lamp simultaneously imaged on the CCD. The HARPS spe... | |||||||||||||
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