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UVES Exposure Time Calculator

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Optical Echelle Spectroscopy Mode Version 6.0.0
Description.
F.A.Q
 
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Input Flux Distribution

Blackbody T: Kelvin
Power Law Index: F(lambda) is proportional to lambda(Index)
Template Spectra Redshift z: The redshift is only applicable with the option Template Spectra.
Object Magnitude:  Band: Vega AB The object magnitude is only relevant for the three options above.
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 single line sources.
Single line λ: [330-1000] nm FWHM: nm Flux 10-16 ergs/s/cm2
Spatial Distribution: Point Source

Sky Conditions

Moon phase: days from new Moon
Airmass:
Seeing: arcsec FWHM in V-band at zenith (use this value in the proposal). The seeing is irrelevant for extended sources.
Probability 60% for a seeing smaller or equal to the requested value
For point sources, the resulting Image Quality FWHM is modeled by the ETC considering the transfer functions of the atmosphere and telescope. For details see the helpfile.

Instrument Setup

Standard Template: Only the central wavelength in parenthesis () can be selected.

Exposure Time:


Results

Tables:  Toggle All / No Tables
Spectral Format
Expected Counts
       
Graphs:  Toggle All / No Graphs
Input Spectrum
Efficiency
Obj
Sky
Maximum Intensity
S/N
Details of Image Quality Calculations (only for pointsources)
      

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