SOFI Exposure Time Calculator

Infrared Spectroscopy Mode Version P100.2
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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

Moon phase: days from new Moon
PWV: mm Probability % of realising the PWV ≤ 10.00 mm
Airmass: range:[1, 3]
Seeing/Image Quality:
For point sources, the resulting Image Quality FWHM is approximated by a gaussian in the ETC considering the transfer functions of the atmosphere, telescope and instrument. See the helpfile for details.
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
	Low Resolution:
	Medium Resolution:


DIT:  s 
Minimum DIT is 1.182 s.


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:

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