Taichi Kato wrote: > The identification is not secure. Since several RV Tau candidates > later > turned out to be CVs, this object would deserve further dense > observations. A keyword search on SY Cir at the ADS gives this abstract link:- http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1997BaltA...6..133D&db_key=AST&high=390983001612865 [which will have wrapped in transmission]. The full article is not available online, unfortunately, for me to check whether the southern star SY Cir is actually mentioned fully in this copy of Baltic Astronomy Vol 6 p133 [Author Dennis W Dawson, 1997]. The following snippet showing the abstract *suggests* that SY Cir has been examined re variability type in this paper, however. Anybody got a non-ecopy [you know, paper and ink]? > Pulsation occurs in late-type giant and supergiant stars under a wide range of atmospheric conditions > and evolutionary stages. Long observational baselines are necessary to distinguish pulsation behaviors. > Spectrographic and photometric observations of a variety of late-type pulsators are considered in the > context of light-curve taxonomy and changing atmospheric conditions. > Cheers John