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 mag AB mag Jy W/m²/µm erg/s/cm²/Å erg/s/cm²/Hz (e.g. 19.3 mag or 2e-17 W/m²/µm)
	Extended source havings ... (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 mag AB mag Jy W/m²/µm erg/s/cm²/Å erg/s/cm²/Hz (e.g. 19.3 mag or 2e-17 W/m²/µm)
		Uniform surface brightness mag/arcsec² AB mag/arcsec² Jy/arcsec² W/m²/µm/arcsec² erg/s/cm²/Å/arcsec² erg/s/cm²/Hz/arcsec² (e.g. 21.6 mag/arcsec²)
with the above brightness normalisation applied in filter U (0.36 µm) B (0.44 µm) g' (0.48 µm) V (0.55 µm) r' (0.62 µm) R (0.67 µm) i' (0.77 µm) I (0.87 µm) z' (0.92 µm) Y (1.02 µm) J (1.25 µm) H (1.65 µm) K (2.2 µm) L' (3.76 µm) M' (4.77 µm) N (10.5 µm) Q (20.1 µm) band
Spectral distribution: (more info) Choose one SED, the redshift and extinction
	Library spectrum of a non-stellar object Mars (540 nm - 5.0 µm) Jupiter (530 nm - 5.9 µm) Saturn (530 nm - 5.9 µm) Uranus (540 nm - 5.0 µm) Neptune (540 nm - 5.0 µm) HII region (Orion, 100 nm - 1.1 µm) Planetary nebula (NGC 7009, 100 nm - 1.1 µm) Planetary nebula (IC 5117, 480 nm - 2.5 µm) Elliptical galaxy (22 nm - 9.7 µm) Spiral galaxy (Sc, 22 nm - 9.7 µm) QSO (80 nm - 0.855 µm) QSO (276 nm - 3.52 µm)
	Library spectrum of a O5V O8III B0V B5-7V B5III B5I A0V A0III A0I A5V A5III F0V F0III F0I F5V F5V-w F6V-r F5III F5I G0V G0V-w G0V-r G0III G0I G2V G5V G5V-w G5V-r G5III G5III-w G5III-r G5I K0V K0V-r K0III K0III-w K0III-r K0-1II K4V K4III K4III-w K4III-r K4I M0V M0III M3V M3III M6V M6III M9III Cool Star Models: 2800K 2600K 2400K 2200K 2000K 1800K 1600K 1400K 1200K 1000K 900K 800K 600K 400K star (300 nm - 6 µm)
	Single emission line at wavelength micron with line flux W/m² erg/s/cm² and line width km/s on a flat (in wavelength) continuum of flux density W/m²/µm erg/s/cm²/Å
	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 (NIRI), telescope, and Altair configuration

Observing condition constraints

Details of observation