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 - with advanced Almanac
  October 5th 2017: Version P101.1 with minor updates:
  • All ETCs
    • Almanac response optimised
  • FORS spectroscopy ETC
    • In polarimetry, the standard deviation of Stokes
      parameters is plotted instead of the S/N
  • SkyCalc
    • Added an option for wavelenghts in vacuum / air
October 30th 2017: Bugfix
  • E-ELT spectroscopy ETC v6.2.3
    • The object spectrum is now the individual
      spectrum per spaxel in order to consistently
      check for saturation.
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