VIMOS Exposure Time Calculator

Optical Multi-Object Spectroscopy Mode Version P109
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:
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
2D simulated image
       
This software has been prepared in collaboration between ESO and the VIMOS consortium