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SOFI Exposure Time Calculator

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Infrared Short Wavelength Imaging Mode Version 3.2.1
Description.
F.A.Q
Performance

    Input Flux Distribution


 Uniform (constant with wavelength)
 Blackbody: Temperature:  Kelvin

Object Magnitude: 

 Single line
	Wavelength:  nm
	Flux:        10-16 ergs/s/cm2 (per arcsec2 for extended sources)
	FWHM:        nm 

Magnitudes are given per square arcsec for extended sources.

Spatial Distribution: Point Source Extended Source

    Sky Conditions

Airmass 
Seeing   arcsec

    Instrument Setup


Filter:
Selecting the filter sets the observation band


	 Wide Band:   
	 Narrow Band: 

Objective:

	



    Detector

DIT:  sec 


    Results

 S/N ratio:             Plotting range:  %  

The total exposure time is the product of DIT (Detector Integration Time), NDIT (number of DITs), and NINT (number of integrations). This exposure time does not take into account instrument and telescope overheads.

 Exposure Time settings:
                  NDIT:  Plotting range:  %
                  NINT: 

On submission the model can generate the following graphs:
(input parameters are replicated in the output page)


 Detector Illumination
 S/N as a function of Exposure Time
 Total Efficiency
 S/N as a function of seeing (only for point-source)
 Input spectrum in physical units



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