Two-chamber image converter for 6-m telescope

Abstract

The results are given of observations with the 6-m telescope and laboratory investigations of a two-chamber image converter of type ~{K-91v with magnetic focusing, field 25 • 40 mm 2, and a plane fiber optic output.An original magnetostatic system has been developed [5] for focusing the image, and this has significantly raised the efficiency of observations.The estimated magnitude limit of the 6-m fast sgectrograph with the tube ~{K-91v for reciprocal dispersion 50 ~/mm has been found on the basis of the observations to be not less than 21 m for an exposure of I h.

Spectral observations of FBS blue stellar objects in the zone δ = + 35°

“…The observations during 1990-1991 were made using a UAGS spectrograph with a UMK-91B three-stage image converter [3] mounted at the Cassegrain focus of the 2.6-m telescope with a 600 lines/mm diffraction grating, which corresponds to a dispersion of 101 ⊕/mm and a resolution of 8-9 Å.…”

Spectral observations of blue stellar objects from FBS in the zone δ =+39°

“…The observations of 1987-1991 were made using a UAGS spectrograph with a UMK-91V triple-cascade image converter tube [11] mounted at the Cassegrain focus. A grating with a dispersion of 101 Å/mm at an angle of 33°w as used to obtain the blue part of the spectrum (3300-6010 Å).…”

Progress in spectral studies of the FBS blue stellar objects

“…UAGS spectrograph [14], remained unprocessed until recently and only with the development of powerful professional scanners has it become possible to digitize and process this data (more than 650 slit spectra of blue stellar objects in the three bands of the FBS with central declinations of o 43 + = δ , +39 o , and +35 o ). These spectra have been published [11][12][13].…”