Astronomical automated dual spectrometer for scanning extended objects.
Abstract
A new moderate resolution spectrometer of the 1.5-m telescope is described. To maximize efficiency and wavelength coverage the light is divided into two spectral regions by a dichroic filter behind the collimator. There are its own gratings and cameras in each spectral channel. The first and the second channels operate independently at wavelength intervals 300 to 780 nm and 760 to 1100 nm, respectively. There is also the third photometric channel which is used for controlling the atmospheric extinction. All the channels use photomultipliers in the impulse-counting regime. The diaphragms block gives an opportunity of image scanning if extended objects are observed. All mechanical operations are made with the help of step engines and electromagnets controlled by a computer.
- Publication:
-
Kinematika i Fizika Nebesnykh Tel
- Pub Date:
- February 1991
- Bibcode:
- 1991KFNT....7...78V
- Keywords:
-
- Gratings (Spectra);
- Mirrors;
- Spectral Resolution;
- Spectrometers;
- Telescopes;
- Astronomical Photometry;
- Atmospheric Attenuation;
- Numerical Control;
- Spectral Bands;
- Instrumentation and Photography