About ASAS project.

About ROSAT data.

About W Ursa Majoris (EW) Variables 
    - X rays from contact binaries?  
    - General Feature of x-ray emission of EW variables

ASAS EW variables as ROSAT sources 
   -  Project report 2001-03
   -  New sample
   -  Stellar Rotation and Magnetic Activity
   -  Poster at Annual Meeting of Chinese Astronomical Society, Taiwan, 2003-04-18