General Catalog of Variable Stars
BAV = Bundesdeutsche Arbeitsgruppe Veränderliche
BRNO = Brno Regional Network of Observers
GEA = Grup d'Estudis Astroṇmicos
GEOS Circulares + Database
eclipsing stars database at the Jagiellonian university in Cracow
Simbad at CDS Strasbourg
the All Sky Automated Survey, new
ROTSE-1 attention! Rotse uses Modified Julian Date, add 0.5 days!
Kepler Eclipsing Binary Catalog>
DSS Digital Sky Survey from Palomar Plates, server at ESO
GSC 2.2 Guide Star Catalog, server at ESO
USNO US Naval Observatory catalog, server at ESO
Wolfgang Moschner = News on variable stars with short periods
Kari Tikkanen Oulu, Finnland