[ ESO ]  

FORS Exposure Time Calculator

Optical Imaging Mode Version 5.0.0
The page is loading... please wait!

Input Flux Distribution

 Uniform (constant with wavelength)
 Blackbody: T =		 Kelvin
 Template Spectra:	  Redshift Z = 

Object Magnitude:    Band: Vega  AB

Magnitudes are given per square arcsec for extended sources. Note that some template spectra are 
defined over a limited wavelength range and may not allow calculations for all instrument configurations.
The object magnitude is not taken into account for the following single line source. Single line Wavelength: nm Flux: 10E-16 ergs/s/cm2 (per arcsec2 for extended sources) FWHM: nm (Minimum value: 0.50) Spatial Distribution: Point Source Extended Source

Sky Conditions

Days From New Moon: Airmass: Seeing: arcsec The sky brightness is determined by the moon phase according to this table

Instrumental Setup

Resolution:   Standard

Detector:     MIT Red -optimized CCD
              E2V Blue-optimized CCD

             Readout mode: 

Polarimetry:  No Polarimetry 
              Linear or Circular Polarisation 


 S/N: Value    Plotting range  %
 Exposure Time (s): Value    Plotting range  %
Plots: Toggle All / No Plots
 Input spectrum in physical units
 Total Efficiency
 CCD Illumination
 S/N as a function of Seeing
 S/N as a function of Exposure Time

[Observing Facilities and Operations] [ESO] [Index] [Help]