HAWK-I Exposure Time Calculator

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Legacy version P95-phase2 (December 2014)
Provided for reference only!

This is not the normal ETC version www.eso.org/observing/etc

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 =	DIT = sec

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

HAWK-I Exposure Time Calculator

Legacy version P95-phase2 (December 2014)Provided for reference only!

Input Flux Distribution

Sky Conditions

Instrument Setup

Results