VIMOS Exposure Time Calculator

Optical Imaging Mode Version 6.1.1
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

Extended Source: Integral Photometry   Aperture Radius arcsec

Indicate the desired aperture magnitude in the broad band associated filter, and the aperture radius

Sky Conditions

Moon phase: days from new Moon
Airmass:
Seeing/Image Quality:
For point sources, the resulting Image Quality FWHM is approximated by a gaussian in the ETC considering the transfer functions of the atmosphere, telescope and instrument. See the helpfile for details.
Seeing: arcsec FWHM in V-band at zenith (use this value in the proposal)
              Probability ---% of realising the seeing ≤ 0.80 arcsec
IQ: arcsec FWHM at the airmass and wavelength of observation (to be used for the OB constraint set)
              The corresponding seeing and probability will be indicated in the ETC output page
Image Quality is not a parameter in AO modes

Instrument Setup

Filter:

Detector:    Object position on CCD:

Observation

S/N:

Exposure Time: s

Results

Plots: Toggle All / No Plots

Input spectrum in physical units
Total Efficiency
CCD Illumination
S/N as a function of Seeing (for pointlike sources only)
S/N as a function of Exposure Time
2D simulated image (pointlike sources only)
       
This software has been prepared in collaboration between ESO and the VIMOS consortium