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
  December 22, 2015: Release for CfP P97 phase2
January 26, 2016: Bug fix in SPHERE ETC (smearing separation)
January 29, 2016: Bug fix in SPHERE ETC (peak flux and ideal DIT calculation)
February 1, 2016: Bug fix in SPHERE ETC (misleading warning about DIT)
February 2, 2016: Bug fix in SPHERE ETC (utilization of Neutral Density values)
  • SPHERE ETC: Improved DIT model, supporting extended
    sources, browser issues fixed, bug fix (smearing separation)
  • VISIR imaging ETC: Updated sensitivity model
  • GIRAFFE ETC: Warning when detector saturation is approached,
    updated CCD parameters, new CCD modes enabled
  • CALVIN: Corrected observability criteria model
ESO Exposure Time Calculators
Imaging Spectroscopy
La Silla EFOSC2  SUSI  WFI  SOFI  EFOSC2  HARPS  FEROS  SOFI 
Paranal UT1 NACO  FORS2  NACO  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 VisCalc  CalVin 

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