[vsnet-alert 8913] Possible activity of southern symbiotic stars

Berto Monard LAGMonar at csir.co.za
Tue Apr 18 23:02:00 JST 2006


not strictly CVs, it can be argued....

The following are observations of symbiotic (Z And) stars dating at UT 20060401.0. They are made at CBA Pretoria (Bronberg Observatory) with a V filtered CCD. The given magnitudes are compared to those from observations made in 2004-2005 at CBA Pretoria and from published data at much earlier times in the form (.../...). Some of those earlier magnitudes refer to bright states of those stars, possibly observed during their discovery as Z And stars. Not much is known about most of the listed symbiotic stars.

* indicates a likely outbursting stage (speculative, a subjective assessment of the reporting observer...)

AE Ara   11.43   (12.7/12.5)   *   
V366 Car   12.78   (13.6/13.0)   *
V417 Cen   11.06   (11.5/12.2)   *   ongoing since about 2 years (AAVSO observations by A Jones)
Hen2-176   15.8   (17.0/15.0)   *
LMC N67   15.3   (16.0/15.9)   *
V347 Nor   15.6   (16.2/16.6)
V343 Ser/AS 289   11.95   (12.7/12.1)
V919 Sgr   12.0   (13.2/12.2)   possibly a bright SR maximum, not an outburst
SS73 96   13.5   (15.0/15.2)   *   
Th 3-7   15.9   (17.0/14.0)   
Ve 2-57   15.3   (16.2/12.5)   

Note that the reported observations are taken from a list of nearly 200 stars that are regularly observed at CBA Pretoria. Except for systems with a Mira or SR type donor star or those that undergo eclipses, the observed magnitudes changed very little over a period of two years. This has been the case with those reported above in the period 2004-2005. 


Berto Monard
Bronberg Observatory / CBA Pretoria







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