Astronomical source definition

Spatial profile and brightness: (more info)
Choose one of point, extended or user-defined source profile and the brightness in any filter/wavelength
Point source (nominal PSF) with spatially integrated brightness (e.g. 19.3 mag or 2e-17 W/m²/µm)
Extended source having ...(When this option is selected the image quality selection in section 3 of the ITC is disabled.)
Gaussian profile with full width half maximum (including seeing) of arcsec and spatially integrated brightness of (e.g. 19.3 mag or 2e-17 W/m²/µm)
Uniform surface brightness (e.g. 21.6 mag/arcsec²)
with the above brightness normalisation applied in filter band

Spectral distribution: (more info)
Choose one SED, the redshift and extinction
Library spectrum of a non-stellar object
Library spectrum of a star (300 nm - 6 µm)
Single emission line at wavelength µm with line flux and line width km/s on a flat (in wavelength) continuum of flux density
Model black body spectrum with temperature K
Model power-law spectrum (S_lambda = lambda ^ )
User-defined spectrum read from file (size < 1MB)
with the spectrum mapped to a redshift z = or a radial velocity v = km/s


Instrument (Ghost) and telescope configuration

Resolution: (more info)
Standard Resolution High Resolution Spectrum central wavelength: nm
Number of sky microlenses (only for SR mode)
Detector Binning:
Binning (spectral,spatial)
Read Modes:   
Telescope configuration: (more info)
Mirror coating: silver
Instrument port: side-looking (3 reflections) Up-looking port
Wavefront sensor for tip-tilt compensation: PWFS


Observing condition constraints

Please read the explanatory notes for the meaning of the percentiles and to ensure that your selected conditions are appropriate for the observing wavelength. Further details are available on the observing condition constraints pages.
Image Quality: 20%/Best 70%/Good 85%/Poor Any arcsec
Cloud Cover: 50%/Clear 70%/Cirrus 80%/Cloudy Any mag
Water Vapor: 20%/Low 50%/Median 80%/High Any
Sky Background: 20%/Darkest 50%/Dark 80%/Grey Any/Bright
Airmass: <1.2 1.5 2.0


Details of observation

Calculation method: (more info)
Select calculation method (note: second method is not available for spectroscopy)
Total S/N ratio resulting from exposures each having an exposure time of secs and with a fraction of exposures that observe the source
(more info)
For spectroscopy, autoscale or specify limits for plotted spectra (lower wavelength µm and upper wavelength µm)