Markarian (1967,1969a,1969b),Markarian and Lipovetskii(1971,1972,1973,1974,1976a,1976b)and Markarian et al.(1977a,b,c,1979a,b)performedan objective-prism survey of the northern sky with the 1-meter Byurakantelescope and discovered 1500 blue galaxies,which are known as Markarian objects.