Catalog of the Photographic Survey of the Northern Sky (FON-2.0) built up from the scanning of astroplates: a new version

Abstract

Astroplates acquired in the course of the Photographic Survey of the Northern Sky project (abbreviated as FON) were scanned at the Main Astronomical Observatory of the National Academy of Sciences of Ukraine (MAO NASU). For this, the Microtek ScanMaker 9800XL TMA and Epson Expression 10000XL scanners were used. From 1600 plates of the total amount, the rectangular coordinates of stars were obtained. After the astrometric reduction, a catalog of the equatorial coordinates and brightness for more than 15 million stars was built up. The mean-squared errors in positions and B magnitudes of the stars in the catalog (from–2° to 90° by declination) mainly depend on the position in a plate, the overlapping multiplicity (that may reach 8), and the stellar magnitude. These errors estimated by internal convergence are within the limits of 0.1′′–0.4′′ and 0.05–0.2^m for the coordinates and stellar magnitudes, respectively.