ESPRESSO - Echelle SPectrograph for Rocky Exoplanets and Stable Spectroscopic Observations


ESPRESSO is the Echelle SPectrograph for Rocky Exoplanets and Stable Spectroscopic Observations installed at the incoherent combined Coudé facility of the VLT. It is an ultra-stable fibre-fed échelle high-resolution spectrograph (R~140,000, 190,000, or 70,000) which collects the light from either one or the four UTs via the so-called UT Coudé trains. The whole system is built to provide the ultimate radial-velocity precision of 10 cm/s over a timespan of 10 years. Read more...

Publications based on data obtained with the ESPRESSO instrument should quote the following reference paper:

Contact Information

  • Questions related to service-mode observations and proposal preparation should be addressed to the User Support Department.
  • Questions related to visitor-mode observations should be addressed to Paranal Science Operations.
  • Please send us comments, suggestions or report errors and inaccurate statements on these webpages and the manuals to the ESPRESSO Operations Team.

Content of these pages

The following items are available on all the ESPRESSO pages using the bar on the left-hand side.

  • Overview: a short description of the instrument.
  • News: a list of changes affecting the instrument and its webpages.
  • Instrument description: all the important parameters of the instrument.
  • Manuals: links to the ESPRESSO documents.
  • Tools: a collection of useful tools and information to prepare and analyze ESPRESSO observations.
  • Instrument Operation Team: the composition of the IOT.
  • Visitor instructions: instrument-specific instructions for Visiting Astronomers.
  • Science: science done with ESPRESSO, including during Science Verification.