Special Notice #267: HST observations of CH Cyg scheduled and monitoring urgently needed
March 15, 2012: As announced in AAVSO Alert Notice 454 (http://www.aavso.org/aavso-alert-notice-454), Dr. Margarita Karovska, Harvard-Smithsonian Center for Astrophysics, has requested multiband photometry (all possible bands), high-speed photometry, spectroscopy, and visual observations of the symbiotic variable CH Cyg in support of HST and Chandra observations. She is studying the central region of CH Cyg and its jet.