The All Sky Automated Survey. The Catalog of Variable Stars. IV.18^h - 24^h Quarter of the Southern Hemisphere

In this paper we present the fourth part of the photometric data from the 9 ◦ × 9 ◦ ASAS camera monitoring the whole southern hemisphere in V -band. Preliminary list (based on observations obtained since January 2001) of variable stars located between RA 18 h and 24 h is released. 10311 stars brighter than V =15 were found to be variable (1641 eclipsing, 1116 regularly pulsating, 938 Mira and 6616 other stars). Light curves have been classified using the automated algorithm taking into account periods, amplitudes, fourier coefficients of the light curves, 2MASS colors and IRAS infrared fluxes. Basic photometric properties are presented in the tables and some examples of thumbnail light curves are printed for reference. All photometric data are available over the INTERNET at http://www.astrouw.edu.pl/˜gp/asas/asas.html or http://archive.princeton.edu/˜asas