Multiple period search for K, M and C type semiregular variables in TUBITAK national observatory

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Yeşilyaprak C., Şahin T., Iskender A.

TURKISH JOURNAL OF PHYSICS, cilt.32, ss.5-12, 2008 (Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 32
  • Basım Tarihi: 2008
  • Dergi Adı: TURKISH JOURNAL OF PHYSICS
  • Derginin Tarandığı İndeksler: Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.5-12
  • Akdeniz Üniversitesi Adresli: Hayır

Özet

In this study, periods obtained from long-term multi-bands (Johnson V and R filters) photometric observations of some K, M andC spectral type semiregular (SR) variables obtainedwith the T40 telescope (40 cm) andSSP5A photometer at TUB¨ ˙ ITAK National Observatory (TNO) between 1998 and 2005 were examined. We have found that some of these SR variables have multiple (long and short) periods as appearedmostly from Hipparcos observations; three variables are, for the first time, observedto have a period. The light curves, the variation amplitude in R band and the maximum light Epoch(s) of SR variables were also given. Besides, some difficulties encountered in the long-term observations were also discussed briefly.