The Digitized First Byurakan Survey on ArmCluster

The Digitized First Byurakan Survey (DFBS) is the digitized version of the famous Markarian Survey, also known as the First Byurakan Survey (FBS). It is the largest low dispersion spectroscopic survey of the sky covering 17,000 square degrees at galactic latitudes |b|>15. DFBS provides the astronomical community with images and extracted spectra for all objects present in the FBS plates. Some 1800 plates have been scanned and stored and programs were developed to compute the astrometric solution, extract the spectra, and apply wavelength and photometric calibration for the objects. The DFBS database and catalog have been assembled containing data for nearly 20,000,000 objects. A classification scheme for the DFBS spectra is being developed. DFBS has been installed on dedicated servers at "La Sapienza" Universita di Roma (Italy) and at present on the ArmCluster at the Institute of Informatics and Automation Problems (Armenia). A work is active on making the DFBS available through the Virtual Observatory standards and access to spectroscopic data. From the point of view of VO, the DFBS is a new database needing both image and spectra access tools and an interchange between these two standards. Algorithms, tools, and facilities needed for efficient use of the DFBS are discussed, in particular the spectra extraction, visualization, and analysis tools. New scientific projects as well as existing surveys will benefit by the digitized images and the ready-to-use extracted spectra which will allow an efficient computer-based analysis of the dataset. The Armenian Virtual Observatory (ArVO) is based on the DFBS database and other large-area surveys and catalogue data and is a part of the International Virtual Observatory Alliance (IVOA).