Second Byurakan Survey

The Second Byurakan Survey (SBS, and sometimes spelled "Biurakan") was a survey carried out from the mid 1970s to the early 1990s, targeting at distant galaxies and quasars, using the Schmidt camera at the Byurakan Observatory in Armenia.

The earlier First Byurakan Survey (FBS) was carried out beginning in the mid 1960s and published in 1989. These were wide surveys, like the Palomar Observatory Sky Survey (POSS), producing sets of plates, thus including stars and galaxies, but using their own specialized photometry, thus providing additional information.