Accurate photometry with digitized photographic plates of the Moscow collection

Photographic plate archives contain a wealth of information about positions and brightness celestial objects had decades ago. Plate digitization is necessary to make this information accessible, but extracting it is a technical challenge. We develop algorithms used to extract photometry with the accuracy of better than ~0.1m in the magnitude range 13 0.2m) variable stars. The algorithms are implemented in the free software VaST available at this http URL