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 a single UT or the four UTs simultaneously via the so-called UT Coudé trains. The whole system is built to reach the ultimate radial-velocity precision of 10 cm/s over a timespan of 10 years in single UT mode. Read more...

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

Contact Information

  • Questions related to proposal preparation, service mode, and visitor mode observations should be addressed via the contact form at  ESO Operations Helpdesk.
  • Please, send us your general feedback, comments, suggestions, or report errors and inaccurate statements in the web pages and manuals also via this contact form.

Content of these pages

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

  • Overview: a brief 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 tools and useful 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 Science Verification.