  The SS433 objects is a well-known source of relativistic jets, which are
formed in supercritical accretion disk. It is very probable that the disk has
polar channels and their radiation is collimated (the photocones). The face-on
SS433 object can appear as beamed ultra-bright (and highly variable) X-ray
source, L_x = 10^39 - 10^42 erg/s. We discuss properties of these hypothetical
objects and their frequency expected in galaxies. We describe a search for such
objects using the ROSAT ASS Bright Source Catalog and Faint Source Catalog
(99528 point-like sources) and the RC3 catalog (16741 spiral and irregular
galaxies). Among in total 418 positive correlations in all types of galaxies we
find that in S and Irr galaxies 142 sources are unknown as AGNs. We isolated by
visual inspection 37 clear non-nuclear, 43 probably non-nuclear and 35 probably
nuclear sources. The last two classes certainly contain many unknown AGNs. The
sources of the 1-st class have X-ray luminosities mainly 10^39 - 3 10^41 erg/s.
Their observed frequency is about 4% - 5% per S/Irr galaxy, what is in
agreement with expected frequency of face-on SS433 stars. The only way to
recognize such stars is their expected violent variability in X-rays.
