The CORALIE spectrograph is an echelle

Echelle grating

An echelle grating is a type of diffraction grating which is characterised by a relatively low groove density but is optimized for high diffraction orders. Echelle gratings are, like other types of diffraction grating, used in spectrometers and similar instruments, such as HARPS, and numerous...

 type spectrograph

Spectrograph

A spectrograph is an instrument that separates an incoming wave into a frequency spectrum. There are several kinds of machines referred to as spectrographs, depending on the precise nature of the waves...

 used for astronomy. This instrument used with a telescope

Telescope

A telescope is an instrument that aids in the observation of remote objects by collecting electromagnetic radiation . The first known practical telescopes were invented in the Netherlands at the beginning of the 1600s , using glass lenses...

 to measure star

Star

A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...

 spectra

Electromagnetic spectrum

The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. The "electromagnetic spectrum" of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object....

 for the Doppler effect

Doppler effect

The Doppler effect , named after Austrian physicist Christian Doppler who proposed it in 1842 in Prague, is the change in frequency of a wave for an observer moving relative to the source of the wave. It is commonly heard when a vehicle sounding a siren or horn approaches, passes, and recedes from...

 to detect the presence of extrasolar planets by the radial velocity method. This instrument was installed on the 1.2m Euler Swiss Telescope at the ESO

ESO

ESO, as a three-letter abbreviation, may stand for:* European Southern Observatory* Ensemble Studios Online* English Symphony Orchestra* Edmonton Symphony Orchestra* Executive Stock Options...

 La Silla Observatory

La Silla Observatory

La Silla Observatory is an astronomical observatory in Chile with three telescopes built and operated by the European Southern Observatory organisation, and several others are partly maintained by ESO...

 in Chile

Chile

Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

 for the Southern Sky extrasolar Planet search Programme.

Characteristics

The resolution of CORALIE is fixed at R = 50,000 with a 3 pixel sampling. The detector CCD is 2k X 2k with a 15 micrometer pixel size.

Planets discovered by CORALIE

Five planetary object have been discovered using CORALIE along with several confirmations of discoveries by other programs.

Planet Planet A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science,...	Date announced
Gliese 86 b Gliese 86 b Gliese 86 b, sometimes referred to as Gliese 86 Ab and or shortened to Gl 86 b, is an extrasolar planet approximately 36 light-years away in the constellation of Eridanus. The planet was discovered orbiting a K-type dwarf star by French scientists in November 1998...	24 November 1998
HD 75289b	1999
HD 130322 b HD 130322 b HD 130322 b is an exoplanet with a minimum mass slightly more than that of Jupiter. It orbits the star in a very close orbit distance being only a quarter that of Mercury from the Sun. It is thus a so-called "hot Jupiter". The planet orbits the star every 10 days 17 hours in a very circular orbit....	1999
HD 192263b	1999
GJ 3021b	2000

See also

• ELODIE spectrograph
  ELODIE spectrograph
  ELODIE was an echelle type spectrograph installed at the Observatoire de Haute-Provence 1.93m reflector in south-eastern France for the . Its optical instrumentation was developed by André Baranne from the Marseille Observatory. The purpose of this instrument was extrasolar planet detection by the...
  
  was a similar device used for the Northern Extrasolar Planet Search

External links

• The Geneva Extrasolar Planet Search Programmes