TASS Mark III photometric survey of the celestial equator

The Amateur Sky Survey (TASS) is se loose confederation of amateur and prof essional astronomers. We describe the design and construction of our Mark I II system, a set of wide-field drift-scan CCD cameras which monitor the cel estial equator down to 13th magnitude in several passbands. We explain the methods by which images are gathered, processed, and reduced into lists of stellar positions and magnitudes. Over the period 1996 October to 1998 Nove mber, we compiled a large database of photometric measurements. One of our results is the tenxcat catalog, which contains measurements on the standard Johnson-Cousins system for 367,241 stars; it contains links to the light c urves of these stars as well.