UVES Exposure Time Calculator

Optical Echelle Spectroscopy Mode Version 6.2.0
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Target Input Flux Distribution

Template Spectrum Redshift
z =
Target Magnitude and Mag.System:   
= Vega
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 phase: days from new Moon
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

Pre slit optics:   Image slicer:   Slit width: arcsec
Free template: Central wavelength: nm    Camera Tilt: pixels
Standard template:
For standard templates, only the central wavelength in parenthesis () can be selected. For free templates, the user can enter values in the range indicated in square brackets []
Below slit filter:
CCD binning:
In the binning, the second value refers to the direction of the dispersion in the spectra

Exposure time:


Include exposure times for S/N:
Tables:  Toggle All / No Tables
Spectral Format
Expected Counts
Graphs:  Toggle All / No Graphs
Input Spectrum
Maximum Intensity