Rapid Photometric Variability Of The Symbiotic System CH Cyg During 2008–15 S. Shugarov, A. Skopal, M. Sekeráš, G. Komissarova and M. Wolf EAS Publications Series, 71-72 (2015) 107-108 Published online: 01 December 2015 DOI: 10.1051/eas/1571021