The present paper is devoted to the construction of a catalog of isolated galaxy pairs extracted from the HyperLEDA extragalactic database .
The radial velocities of the galaxies in the pairs are in the range [ 3000 , 16000 ] km.s ^ { -1 } .
In order to get an unbiased pair catalog as complete as possible , we have limited the absolute magnitude of the galaxies to M \leq - 18.5 ) .
The criteria used to define the isolated galaxy pairs are the following : 1 ) Velocity criterion : radial velocity difference between the pair members \Delta V < 500 km.s ^ { -1 } ; 2 ) Interdistance criterion : projected distance between the members r _ { p } < 1 Mpc ; 3 ) Reciprocity criterion : each member is the closest galaxy to the other one , which excludes multiplets ; 4 ) Isolation criterion : we define a pair as isolated if the ratio \rho = r _ { 3 } / r _ { p } of the projected distance of the pair to its closest galaxy ( this one having a velocity difference lower than 500 km.s ^ { -1 } with respect to the pair ) and the members projected interdistance r _ { p } is larger than 2.5 .
We have searched for these closest galaxies first in HyperLEDA M-limited source catalog , then in the full one .
We have managed not to suppress the small number of pairs having close-by but faint dwarf galaxy companions .
The galaxy pair catalog lists the value of \rho for each isolated pair .
This method allows the user of the catalog to select any isolation level ( beyond the chosen limit \rho > 2.5 ) .
Our final catalog contains 13114 galaxy pairs , of which 57 % are fairly isolated with \rho > 5 , and 30 % are highly isolated with \rho \geq 10 .