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EFOSC2 Exposure Time Calculator


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

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

Optical Spectroscopy Mode Version 5.0.0
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Input Flux Distribution

 Uniform (constant with wavelength)
 Blackbody: T =		 Kelvin
 Template Spectra:	  Redshift Z = 

Object Magnitude:    Band: Vega  AB

Magnitudes are given per square arcsec for extended sources. Note that some template spectra are 
defined over a limited wavelength range and may not allow calculations for all instrument configurations.
The object magnitude is not taken into account for the following single line source. Single line Wavelength: nm Flux: 10E-16 ergs/s/cm2 (per arcsec2 for extended sources) FWHM: nm (Minimum value: 0.50) Spatial Distribution: Point Source Extended Source

Sky Conditions

Days From New Moon: Airmass: Seeing: arcsec The sky brightness is determined by the moon phase according to this table

Instrumental Setup

Slit width:
Detector: CCD#40 Readout mode: Binning: (spectral)×(spatial)
Polarimetry Mode: No polarimetry Linear polarisation


 S/N:			Value    Plotting range  %
 Exposure Time (s):	Value    Plotting range  %

Plots: Toggle All / No Plots Object Spectrum Sky Spectrum Input spectrum in physical units Signal-to-noise Total Efficiency and Wavelength Range 2D simulated image

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

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