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symbiotic variable

Special Notice #268: Chandra observations scheduled for CH Cyg and monitoring urgently needed

23 March 2012: The Chandra X-ray satellite observations of the symbiotic variable CH Cyg have been scheduled as part of Dr. Margarita Karovska's (Harvard-Smithsonian Center for Astrophysics) campaign. Please see AAVSO Alert Notice 454 and AAVSO Special Notice #267 for complete details on this observing campaign. The HST observations of CH Cyg have already been made.
 

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.

Alert Notice 451: Monitoring of the Symbiotic Variable RT Cru Requested

January 27, 2012: The symbiotic variable RT Cru has brightened in hard x-rays. Dr. Jeno Sokoloski, Columbia University, has requested AAVSO assistance in monitoring RT Cru both now and in the future to see if it is doing anything unusual in the optical. The Swift/BAT hard X-ray light curve shows RT Cru has apparently been gradually brightening over the past few years.  

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