ИСТИНА

Some astrophotometry problems require accuracy within 0.001-0.003 magnitude, both in the random and systematic sense. Many research teams are planning now to carry out new sky surveys. These surveys will be made in different photometric systems and each photometric system will need its own standards. Thus, the main problem of photometric standardization becomes a task to construct the fundamental photometric catalog. Magnitudes of stars in the catalog have to be easily transformed to any specified photometric system without sacrifice of accuracy.