Exposure Time Calculators

Formula Book

 

• Main formula
• The input flux wavelength distribution
  • Blackbody
  • Template Spectra
  • Power Law
  • Continuum
  • The effect of the object magnitude at a specific observation band
  • Single Line source
• Energy of each photon
• The telescope surface
• The exposure Time
• The total efficiency
  • The slit trasmission factor
• The factors $\Delta _{S}$ and $\Delta _{i}$
  • The sky contribution
• The FWHM of the Image Quality profile
• Example cases
  • SOFI-Spectroscopy
    • Point Source
    • Sky
  • FORS1-Spectroscopy
    • Point Source
    • Sky
  • ISAAC-Imaging
    • Point Source
    • Sky
  • SUSI2-Imaging
    • Point Source
    • Sky
  • UVES
    • Expected Object counts
    • Expected Sky counts
    • Signal To Noise Ratio

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