EFOSC2 Exposure Time Calculator

Optical Imaging Mode Version P105-beta
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

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:
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


Instrumental Setup

Filter:
Polarimetry: No polarimetry
Linear or circular polarisation
Detector: Readout mode:    binning:

Results

S/N:
Exposure Time: s

Plots: Toggle All / No Plots

CCD Illumination (Including Sky Background)
CCD Illumination (Object only)
CCD Illumination (Sky only)
Sky Background Spectrum in physical units (erg/s/cm2/A/arcsec2) and (ph/s/m2/micron/arcsec2)
Sky Transmission Spectrum
System Efficiency excl. Atmosphere
S/N as a function of Image Quality
S/N as a function of Exposure Time
Input spectrum in physical units

Debug text output