Catalog of Average Magnetic Phase Curves of Stars. II. Addendum to the Second Catalog

The main objectives of this work is to obtain the average magnetic phase curves of stars in order to determine their parameters for the purpose of describing their magnetic behavior and for statistical studies. This work was necessitated by two factors: the appearance of new high-accuracy magnetic measurements, which made it possible to refine the variability parameters for some previously studied stars; and the availability of new magnetic measurements for stars with rotation periods determined from high-accuracy photometry from space missions. As a result of this addition, average magnetic phase curves are currently available for 415 stars, 258 of which are Ap/Bp stars. Such a large number of Ap/Bp stars allows one not only to estimate the variability parameters but also to try to find a cause explaining the extremely slow rotation of some of these stars.