ESO Exposure Time Calculators     

Documentation and Tools News and Notes
  • Frequently Asked Questions
  • Formula Book
  • Database of efficiency profiles
  • Retired ETCs
  • Historic ETC versions:
  • SkyCalc Sky Model Calculator
  July 04, 2016: Release for CfP P98 phase2
  • New sky model is now also enabled in the optical imaging ETCs
    VIMOS, FORS, OmegaCAM, EFOSC2, SUSI and WFI, as well as the
    echelle spectography ETCs X-SHOOTER, UVES, HARPS and FEROS.
  • VISIR ETCs updated with adjusted senitivity and new spectral ranges.
    The outer-scale parameter L0 in the atmospheric part of the VISIR
    seeing/IQ model has been changed
  • NACO imaging bug fix and performance improvement
  • NACO spectroscopy is no longer offered
  • SkyCalc bug fixes
ESO Exposure Time Calculators
Imaging Spectroscopy
La Silla EFOSC2  SUSI  WFI  SOFI  EFOSC2  HARPS  FEROS  SOFI 
Paranal UT1 NACO  FORS2  FORS2  KMOS 
Paranal UT2   UVES  UVES-FLAMES  GIRAFFE  X-SHOOTER 
Paranal UT3 VISIR   VIMOS 
SPHERE-IRDIS  SPHERE-ZIMPOL 
VISIR  SPHERE-IFS 
VIMOS-MOS  VIMOS-IFU 
Paranal UT4 HAWK-I  SINFONI  MUSE 
Paranal VISTA VIRCAM   
Paranal VST OmegaCAM   
E-ELT E-ELT  E-ELT 
VLTI GRAVITY  VisCalc  CalVin 

Send comments and questions to usd-help@eso.org