PSFuv
PSFuv stands for the ultraviolet point spread function, a characterization of how an optical system forms images of point sources in the ultraviolet portion of the spectrum. It describes the two-dimensional distribution of light in the image plane produced by a single, unresolved source as observed by UV instruments. PSFuv depends on wavelength, aperture geometry, optical aberrations, diffraction, and detector sampling, and is usually specified for a given optical configuration or field position.
In theory, the PSF is the squared magnitude of the Fourier transform of the pupil function. For
Measurement and modeling: PSFuv is estimated from observations of bright, isolated stars, or generated by optical
See also: Point spread function, Ultraviolet astronomy, Diffraction, TinyTim (HST PSF modeling).