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HARPS Exposure Time Calculator

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Optical Echelle Spectroscopy Mode Version 5.0.1
Description.
F.A.Q
 
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Input Flux Distribution

Blackbody T: Kelvin
Power Law Index: F(λ) is proportional to λ(Index)
Template Spectra Redshift z: The redshift is only applicable with the option Template Spectra.
Object Magnitude (Vega system): Band: 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: [380-690] nm FWHM: nm Flux 10-16 ergs/s/cm2
Spatial Distribution: Point Source

Sky Conditions

Moon: from new moon
Airmass:
Seeing: arcsec (range: [ 0.30 ; 3.00 ])

Instrument Setup

Polarimetry:
The S/N and flux estimates in polarimetric mode are computed for fiber A only taking into account the transmission of the polarimetric optics. Fiber B suffers an efficiency loss of ~30% with respect to fiber A solely due to the fiber transmission.
CCD mode:

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
   

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