SOFI Exposure Time Calculator

Infrared Spectroscopy Mode Version P103.2
Description
FAQ
 
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Input Flux Distribution

 Uniform (constant with wavelength)
 Blackbody: Temperature:  Kelvin

Object Magnitude:  Vega  AB

 Single line
	Wavelength:  nm
	Flux:        10-16 ergs/s/cm2 (per arcsec2 for extended sources)
	FWHM:        nm 
Spatial Distribution: Point Source    Extended Source
Magnitudes are given per square arcsec for extended sources

Sky Conditions

Override almanac sky parameters and use instead typical fixed sky model parameters except Moon phase and airmass
Moon FLI: Airmass:
Time
Time step forward/back



Target
Target coordinates Name or ID:  
α      δ     
UT rise
culm.
set
Hour Angle azimuth altitude zenith distance airmass FLI moon/sun
phase angle
moon/target
separation
Target
Moon
Sun
An advanced almanac is available in the ESO SkyCalc sky model calculator
PWV:     mm         Probability % of realising the PWV ≤ 10.00 mm
Seeing/Image Quality:
Seeing: arcsec FWHM in V-band at zenith (use this value in the proposal)
              Probability ---% of realising the seeing ≤ 1.00 arcsec
IQ: arcsec FWHM at the airmass and wavelength of observation (to be used for the OB constraint set)
              The corresponding seeing and probability will be indicated in the ETC output page
Image Quality is not a parameter in AO modes


Instrument Setup

Slit:  arcsec
  
Grisms:
	Low Resolution:
    
	Medium Resolution:

Detector

DIT:  s 
Minimum DIT is 1.182 s.

Results

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:  
                  NINT: 

Plots: Toggle All / No Plots

 Resultant spectrum including sky
 Object spectrum only
 Sky spectrum only
 Sky Transmission spectrum only
 S/N as a function of wavelength
 Total efficiency and wavelength Range
 Input spectrum in physical units

 Debug text output