Halpha and Hbeta values for X Cygni J/AJ/162/149.graph_sql_1_magHalpha Hbeta
Litterature times of maximum light for X Cygni
Continuum spectrum of X Cygni J/AJ/162/149.graph_sql_4spectrum
O-C diagram of Halpha J/AJ/162/149.graph_sql_6O-C