Vestal: space astronomical observatory for the far ultraviolet: 100 to 500 A

Abstract

An optical system of three-cannal telescope-spectrometer is proposed for the registration of the spectra of individual stars in the extreme short wavelength region, shorter 500 A up to 100 A (project VESTAL). The calculated optical parameters of both components of main telescope, two parabolic mirrors with entrance diameter of 1200 mm and three spectrometers of Wadsworth system, are presented as well.