A call for observations of the famous symbiotic star, one of the brightest, CH cyg has been launched by Margaritta Karovska. This is to support observations planned for the next two weeks in X ray (CHANDRA) and otical/UV (HST) domains. Observations are...

Hello, recently the pre main double star Z cma showed a stong photometric outburst according to the AAVSO special notice #232 http://www.aavso.org/aavso-special-notice-232 A new amateur international spectroscopic campaign has been designed to gather...

Symbiotic star ci Cygni is going on eclipse these last weeks with a Mv dropping to 11.4. The period of the system is about 853 days and maximum is awaited for mid November At the same time the system has an ongoing outburst from the disk around the white...

Cette étoile Oe magnétique, O?fpe a un comportement étrange, un appel à contribution est lancé. On ne connait qu'une poignée d'étoiles O de ce type et celle ci est entouré d'un disque qu'elle contraint par son fort champs magnétique. On observe de fréquentes...