ADAM low- and medium-resolution spectrograph for 1.6-m AZT-33IK
  telescope
  We describe the design of a low- and medium-resolution spectrograph (
R=300-1300) developed at the Special Astrophysical Observatory of the Russian
Academy of Sciences (SAO RAS) for the 1.6-m AZT-33IK telescope of Sayan
Observatory of the Institute of Solar-Terrestrial Physics of the Siberian
Branch of the Russian Academy of Sciences. We report the results of laboratory
measurements of the parameters of the instrument and tests performed on the SAO
RAS 1-m Zeiss-1000 telescope. We measured the total quantum efficiency of the
"spectrograph + telescope + detector" system on AZT-33IK telescope, which at
its maximum reaches 56%. Such a hight transparency of the spectrograph allows
it to be used with the 1.6-m telescope to determine the types and redshifts of
objects with magnitudes m_AB~20-21, that was confirmed by actual observations.
