(IX/18) EINSTEIN extended source survey (EXSS) (Oppenheimer+ 1997) (EXSS)

(IX/15) Einstein EMSS Survey (Gioia+ 1990, Stocke+ 1991) (EMSS)

(IX/13) The 2E Catalogue (Harris+ 1994) (2E)

(IX/12) The WGACAT version of ROSAT sources (White+ 1995)(WGACAT,1WGA,WGA)

(IX/11) ROSAT Source Catalog (Voges+ 1994) (1RXP)

(IX/10) ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1996)

(1RXS,RASS-BSC)