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Special Notice #112: Support for CH Cygni observations with HST and Chandra

June 7, 2008

Dr. Margarita Karovska (Harvard-Smithsonian CfA) and collaborators request intensive observations of the symbiotic star CH Cygni beginning immediately (2008 June 07), and continuing through 2008 June 15.  Nightly monitoring is requested through the end of June 2008.

Dr. Karovska and collaborators are studying the accretion and jet formation processes in this symbiotic star using both Hubble Space Telescope and Chandra X-Ray Observatory observations to be made beginning 2008 June 09.  Optical observations by AAVSO observers are requested to provide photometry that supplements the high angular resolution imaging to be conducted by the space-based observatories.

Both visual and instrumental observations are requested, and intensive V-band photometry is particularly encouraged if possible.  If possible, multicolor photometry is also encouraged, and all optical bandpasses from UBV through near-IR (RIJH) are valuable.

CH Cyg is located at RA: 19 24 33.10 , Dec: +50 14 29.0 (J2000)

Charts for CH Cyg may be plotted using VSP: http://www.aavso.org/observing/charts/vsp/index.html?pickname=ch%20cyg

This AAVSO Special Notice was prepared by Matthew Templeton and Margarita Karovska.

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