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
  August 30, 2016: Release for CfP P99 phase1
  • The new sky model has been updated with adjusted ozone and CO2
    abundances and minor changes in the moonlight model.
  • The outer-scale parameter L0 in the atmospheric part of the
    seeing/IQ model has been changed in all ETCs, except VISIR
    in which L0 was already updated in the previous ETC release.
    This has changed the S/N reference area, in particular at long wavelengths.
  • VISIR ETCs sensitivites updated.
  • SkyCalc: New sky model version and additional plot options.
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