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: http://www.sao.ru/Doc-en/Science/results/ar_facil/res2002.html
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A quartz echelle spectrograph with a large diameter of the collimated beam
(NES) equipped with a CCD (2048x2048 elements) was designed, manufactured
and put into operation in the Nasmyth focus of the 6-m telescope.
The spectrograph provides the spectral resolution of up to R=82000
in the wavelength range of 320-1000nm. The information content of
observations with high spectral resolution at the telescope is increased
tenfold.
In collaboration with the University of Uppsala (Sweden)
A new-generation CCD system with the cryostat matrix detector sized
2048x2048 elements was designed and put into operation at the 6-m
telescope. Digital video signal filtering and correction of the light
transmission characteristics were implemented for the first time. This
provides the limiting sensitivity and photometric stability for
the astronomical practice. The readout noise is reduced by 30-40%
compared with the traditional methods of data reduction (with
the EEV CCD42-40 - 1.7 electrons). The residual nonlinearity does not
exceed 0.03%, and relative photometric instability does not exceed 0.06%
over 24 hours. Production of such systems with the CCD42-40 for the 6-m
telescope is tailored.
In collaboration with the Institute of Applied Physics of the RAS
We have developed and tested the model of a new-generation three-element broadband radiometric matrix system at the RATAN-600 extremely short wavelength of 1 cm, allowing a large replication to over 100 elements. The sensitivity of 6mK reached without cooling is close to the sensitivity of the cryogenic radiometers of the RATAN-600 in the given range.
New electrodynamic calculations of the RATAN-600 power beam pattern, including the diffraction effects and the account of the finite size width of the primary mirror aperture are in good agreement with the experimental measurements over a wide wavelength range and a large solid angle, conducted in 2002. These measurements and the power beam pattern calculation programs increase the accuracy of measurements of the flux densities and radio brightness distributions of extended cosmic sources, and are used in the data processing and modeling of the recent and future radio surveys featuring the radio source counts, and in the studies of the anisotropy of the cosmic microwave background.
Creation of a basic high speed Ethernet information computer network of the SAO RAS has been accomplished. It now provides access to the BTA and RATAN-600 telescopes at 155 Mbit/s based on the 27 km-long fiber optic link. The outgoing Internet speed reached is 2 Mbit/s.
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