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HAWK-I Exposure Time Calculator

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Infrared Imaging Mode Version 5.0.0
Description.
F.A.Q
 
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Input Flux Distribution

Uniform (constant with wavelength) Target Magnitude and Mag.System:
= Vega
AB
Magnitudes are given per arcsec2
for extended sources.
Template Spectrum:
Redshift z =
Blackbody: Temperature : K
Single Line :
Lambda: nm
Flux: 10-16 ergs/s/cm2 (per arcsec2 for extended sources)
FWHM: nm
Spatial Distribution:
Point Source  
Extended Source diameter: arcsec
The Magnitude (or flux) is given per arcsec2 for extended sources.
Extended Source (per pixel)

Sky Conditions

Airmass:
Seeing: arcsec (FWHM in V band)


Instrument Setup

Filter:
Detector mode: Non-destructive Read-out (NDR)

Results

S/N ratio: S/N = DIT = sec
Exposure Time: NDIT =

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

Plots: Toggle All / No Plots

Resultant spectrum including sky
Object Spectrum only
Sky Emission Spectrum
Sky Transmission Spectrum
S/N as a function of Exposure Time
Total Efficiency
Input spectrum in physical units

Detailed S/N info
   

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