VIMOS Exposure Time Calculator

Optical Multi-Object Spectroscopy Mode Version P101.6, February 9 2018
Description
FAQ
 
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Target Input Flux Distribution

Template Spectrum Redshift
z =
Target Magnitude and Mag.System:   
= Vega
AB
Magnitudes are given per arcsec2 for extended sources
MARCS Stellar Model
Upload Spectrum
Blackbody Temperature: K
Power Law Index:           F(λ) ∝ λindex
Emission Line
Lambda: nm
Flux: 10-16 ergs/s/cm2 (per arcsec2 for extended sources)
FWHM: nm

Spatial Distribution:

Point Source

Extended Source Surface Brightness   Semi-Major Axis arcsec
      For De Vaucouleurs and exponential profiles, the projected Semi-Major Axis is the effective radius along the slit.

Sky Conditions

Moon FLI: Airmass:
Almanac
Time
Time step forward/back



Target
Target coordinates Name or ID:  
α      δ     
UT rise
culm.
set
Hour Angle azimuth altitude zenith distance airmass FLI moon/sun
phase angle
moon/target
separation
Target
Moon
Sun
An advanced almanac is available in the ESO SkyCalc sky model calculator
PWV:     mm     Probability % of realising the PWV ≤ 10.00 mm
Seeing/Image Quality:
Turbulence Category:   (FWHM of the atmospheric PSF outside the telescope at zenith at 500 nm)
IQ: arcsec FWHM at the airmass and reference wavelength
              The corresponding seeing and turbulence category will be indicated in the output page
Image Quality is not a parameter in AO modes


Optical Path

Grism:

Slit width:arcsec    length: arcsec

Detector:

Observation

S/N:

Exposure Time: s

Results

Plots: Toggle All / No Plots

Object Spectrum
Sky Spectrum at central row
Total spectrum (object+sky) at central row
Input spectrum in physical units
Total Efficiency and Wavelength Range
Signal to noise versus wavelength
       
This software has been prepared in collaboration between ESO and the VIMOS consortium