SHAO SPECTROGRAPH FOR LOW-RESOLUTION SPECTRA

Abstract

The paper describes an improved spectrograph of the Cassegrain focus of the 2 m SHAO reflector using a CCD camera. The classic Universal Astro Grid Spectrograph (UAGS) has been adapted to use the Andor CCD camera to obtain spectra of low-brightness objects in the range 3600-8000 Å. A spectrograph with a diffraction grating of 651 pcs/mm makes it possible to obtain spectra of stars on the 2 m SHAO telescope up to magnitude 18 with a resolution of R = 1200, with a signal to noise ratio of about 50 per half hour of exposure. The maximum allowed resolution is R=3400. The complex can be used to observe various types of transient objects, stars, and extragalactic objects.