Documentation and Tools
  • Support: https://support.eso.org
  • Frequently Asked Questions
  • Formula Book
  • Database of efficiency profiles
  • ETC1 instruments
    (deprecated or migrated to ETC2.0)
  • SkyCalc Sky Model Calculator
      - with advanced Almanac
      - command-line interface skycalc_cli

News and Notes

July 15, 2026

P118 Phase 1, see the ETC2.0 change log


Facility
Imaging
Spectroscopy
La Silla EFOSC2  EFOSC2  HARPS NIRPS
Paranal UT1 KMOS 
FORS2
Paranal UT2   UVES  UVES-FLAMES 
GIRAFFE 
Paranal UT3 SPHERE-IRDIS  SPHERE-ZIMPOL  X-SHOOTER  SPHERE-IFS
CRIRES
Paranal UT4 HAWK-I  MUSE 
ERIS
Paranal ICCF   ESPRESSO
Paranal VISTA   4MOST
Paranal VLTI GRAVITY  MATISSE  VisCalc  CalVin 
ELT ELT imaging  ELT spectroscopy