ESO Exposure Time Calculators     

Documentation and Tools News and Notes
  • Frequently Asked Questions
  • Formula Book
  • Database of efficiency profiles
  • Previous ETC versions:
  • SkyCalc Sky Model Calculator
    - with advanced Almanac
    - command-line interface skycalc_cli
  January 10th, 2020
HAWK-I ETC: Corrected a bug which caused the
input values of airmass and moon phase to be
ignored, always using the default values instead.

December 19th, 2019
Corrected wrong IQ calculations in MUSE
WFM_AO mode and HAWKI in AO TTS free mode.
ESO Exposure Time Calculators
Imaging Spectroscopy
La Silla EFOSC2  SUSI  WFI  SOFI  EFOSC2  HARPS  FEROS  SOFI 
Paranal UT1 FORS2 FORS2  KMOS 
Paranal UT2   UVES  UVES-FLAMES  GIRAFFE  X-SHOOTER 
Paranal UT3 VISIR   SPHERE-IRDIS  SPHERE-ZIMPOL  VISIR  SPHERE-IFS
Paranal UT4 HAWK-I  MUSE 
Paranal ICCF   ESPRESSO
Paranal VISTA VIRCAM  4MOST
Paranal VST OmegaCAM   
E-ELT E-ELT  E-ELT 
VLTI GRAVITY  MATISSE  VisCalc  CalVin 

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