AAVSO Alert Notice 454: Monitoring of CH Cyg Requested for Chandra and HST ObservationsAAVSO Alert Notice 454: Monitoring of CH Cyg Requested for Chandra and HST Observations
AAVSO Alert Notice 454<br /> Monitoring of CH Cyg Requested for Chandra and HST Observations<br /> March 2, 2012 <p>Dr. Margarita Karovska, Harvard-Smithsonian Center for Astrophysics, has requested visual and photometric observations of