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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 Imaging 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

Detector: CCD#40 Readout mode: Binning:
Polarimetry Mode: No polarimetry Linear or circular polarisation


 S/N: Value    Plotting range  %
 Exposure Time (s): Value    Plotting range  %
Plots: Toggle All / No Plots
 Input spectrum in physical units
 Total Efficiency
 CCD Illumination
 S/N as a function of Seeing
 S/N as a function of Exposure Time

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

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