Optical Exposure Time Calculator

GIRAFFE Exposure Time Calculator

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Optical Spectroscopy Mode Version 3.2.7a

Description.

F.A.Q

Performance

Source Model

Input Flux Distribution

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

Object Magnitude: Band:

Note that some template spectra are defined over a limited wavelength range and may not allow calculations for all instrument configurations.

Source Geometry

Point Source

Extended Source

Sky Conditions

Days From New Moon:

Airmass:

Seeing: arcsec (range: [ 0.30 ; 3.00 ])

Instrument Setup

Fiber Mode (Sky Sampling):

MEDUSA mode only: Object-fiber displacement: arcsec (range: [ 0.00 ; 0.60 ]).
In other modes, this value is irrelevant and has no effect.

High resolution :	Setup Name (Central Wavelength)
Low resolution :	Setup Name (Central Wavelength)

Detector: (Carreras) CCD mode:
Characteristic curves for the optical components of GIRAFFE

Results

 S/N:			Value    Plotting range  %
Exposure Time (s):	Value    Plotting range  %
On submission the model can generate the following graphs:
 
 Object Spectrum
 Sky Spectrum
 Input spectrum in physical units
 Signal-to-noise
 Total Efficiency and Wavelength Range

 Use fine spectral sampling


           











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