ERIS - Enhanced Resolution Imaging Spectrograph


The Enhanced Resolution Imager and Spectrograph (ERIS) is a near-infrared instrument at the Cassegrain focus of UT4. ERIS has two science arms, SPIFFIER and NIX. SPIFFIER (IFS) is a medium-resolution integral field spectropgrah covering J to K band. NIX is capable of imaging between J and M band, focal and pupil-plane coronagraphy between K and M band, and long-slit spectroscopy in the L band. ERIS is designed to be used in conjunction with UT4's deformable secondary. The atmospheric turbulence can be sensed with either a natural guide star, or a single artificial star generated with the Laser Guide Stars Facility. ERIS replaces many of the functionalities provided by both NaCo and SINFONI within a single instrument.

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

Contact Information

  • Questions related to service mode observations and proposal preparation should be made via our ticketing system at the ESO Operations Helpdesk.
  • Please send us your comments, suggestions and report errors and inaccurate statements in the web pages and manuals.

Content of these pages

The following items are available on all the ERIS pages, using the bar on the left.

  • Overview: a short description of the instrument
  • News: list of changes affecting the instrument and/or its pages.
  • Instrument Description: all the important parameters of the instrument.
  • Manuals: links to all the documents related to ERIS.
  • Tools: a collection of useful tools and informations for preparing and analyzing the ERIS observations.
  • Instrument Operations Team: the composition of the operations team.
  • Visitor Instructions: Instrument specific instructions for Visiting Astronomers
  • Science: Science done with ERIS, incl. during Science Verification