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
  January 17th, 2018: Version P101.5
  • Bugfix for the SPHERE IRDIS ETC
    • Bugfix for filter DB_K12 combined
      with neutral density ND1.
December 21th, 2017: Version P101.4
  • NACO ETC
    • Instrument throughput model adjusted
  • OmegaCAM ETC
    • Throughput model adjusted
      only the u' filter is affected
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