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High Accuracy Radial velocity Planet Searcher






HARPS HARPS, the High Accuracy Radial velocity Planet Searcher at the ESO La Silla 3.6m telescope is dedicated to the discovery of extrasolar planets. It is a fibre-fed high resolution echelle spectrograph. Read more...
Harps logo HARPS Consortium, project overview, history, technical publications
HARPS in the press
HARPS image gallery
June 16th, 2008: A system with three "super-Earth" planets has been detected by HARPS. The three planets have masses of 4.2, 6.9 and 9.2 the mass of the Earth. The RMS of the residuals to the fitted orbits is of only 0.85m/s in 5 years, including instrumental and stellar effects. ESO press release, Nature press release.
April 15th, 2008: The birthplace of the exoplanet-host star Iota Orologii has been identified thanks to HARPS observations: Press release.
May 1st, 2007: HARPS reduced data can be requested from the HARPS Advanced Data Products archive.
April 25th, 2007: HARPS discovers the first rocky planet (5 times the mass of the Earth) in the habitable zone.
Read the ESO press release and the paper
December 08th, 2006: New pipeline release: 3.0.
May 17th, 2006: HARPS unveils an extrasolar planetary system with three Neptune-mass planets. Read the ESO press release
May 15th, 2006: New, "slow" readout mode available.
May 15th, 2006: New release of the User manual for P78
March 1st, 2006: The high efficiency fibre link (EGGS) has been included in the call for proposal for period 78.
August 8, 2004: Secondary mirror unit changed; system efficiency increased by up to 40%.
August, 2004: 14 Earth masses exoplanet discovered ! ESO press release (22-04), Paper
May, 2004: Iodine self calibration method not available.
December, 2003: First HARPS planet candidate (HD330075b): Announcement, Paper
October 1, 2003: Instrument offered to the community.
February 11, 2003: FIRST LIGHT! ESO Press Release (06/03)

Please mail the La Silla HARPS team for comments, suggestions or to report errors and inaccurate statements in the web pages and manuals.

Publications based on data obtained with the HARPS instrument should quote the following reference paper: Mayor, M. et al. 2003, The Messenger 114, 20.

Instrument Characteristics & monitoring
Instrument description
Spectral format
Instrument performance
Detector description and performance monitoring
Instrument monitoring
Information Sources, Observing Tools
HARPS manuals
HARPS archive
Exposure Time Calculator
HARPS observing tools
Science links

Observing with HARPS
Observing with HARPS
Science modes:
Data reduction pipeline
Telescope Features
The 3.6m telescope
Pointing limits
Target acquisition
Tracking and guiding
Image quality
Weather limits
Hatches opening
Internal pages
HARPS internal pages (ESO access only)


Send comments to the La Silla HARPS team
Last modified: May 16, 2006 15:28

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