Alert Notice 681: Photometry of more symbiotic candidates requested
September 18, 2019
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observing Reports: https://www.aavso.org/symbiotic-candidates-campaign
symbiotic variable
Alert Notice 665: R Aqr observations needed urgently
Note: Dr. Margarita Karovska (Center for Astrophysics|Harvard & Smithsonian) is also urgently requesting BVRI photometry, visual observations, and spectroscopy of R Aqr through (at least) the end of the observing season. - Elizabeth O. Waagen, August 5, 2019
Note: R Aqr is out of its seasonal gap and is increasingly observable. Continued coverage is requested as described below until further notice. - Elizabeth O. Waagen, May 3, 2019
Alert Notice 650 - REVISED: Photometry and spectroscopy of more symbiotic candidates requested
This replaces the text of AAVSO Alert Notice 650 issued earlier on Spetember 14, 2018. - E. O. Waagen, AAVSO
Alert Notice 639: CH Cyg coverage requested
Note from Aril 2020: Ongoing coverage continues to be extremely important, with V and particularly B being given priority over Rc and Ic. As always, visual observations are requested and encouraged. - Elizabeth O. Waagen, April 6, 2020
Note from August 2019: Ongoing coverage is extremely important, with V and particularly B being given priority over Rc and Ic. As always, visual observations are requested and encouraged. - Elizabeth O. Waagen, August 28, 2019
Alert Notice 589: R Aqr coverage needed for HST and Chandra observations
Note: This campaign has been extended through the 2018 observing season.
August 4, 2017: Dr. Margarita Karovska (Harvard-Smithsonian Center for Astrophysics) has requested "visual, photometric, and spectroscopic observations of the symbiotic variable R Aqr in preparation for and in support of Chandra and HST observations currently scheduled for October 2017."
Special Notice #70: Brightening of the symbiotic star AG Draconis
October 3, 2007: It was reported in CBET 1091 by U. Munari et al. that the symbiotic star AG Draconis is again in outburst following the decline from its April 2006 bright outburst. They note that the decline apparently halted on 2007 July 07, and has since brightened steadily. Their observations place AG Dra at V = 8.98 on 2007 September 30.8 UT (B = 9.69 and B-V = +0.71). They also note the presence of strong hydrogen and helium emission lines.
Special Notice #64: FN Sgr AND VZ Sgr
September 7, 2007
SYMBIOTIC VARIABLE 1848-19 FN SGR ACTIVE
Special Notice #112: Support for CH Cygni observations with HST and Chandra
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June 7, 2008
Special Notice #121: Outburst of the symbiotic star CI Cygni
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August 31, 2008
Special Notice #152: Increased activity in the symbiotic star AX Persei
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AAVSO Special Notice #152
Increased