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VLBI Astrometry of AGB Variables with VERA -- A Semiregular Variable S Crateris --

Akiharu Nakagawa,Miyuki Tsushima,Kazuma Ando,Takeshi B USHIMATA,Yoon Kyung Choi,Tomoya H IROTA,Mareki Honma,Hiroshi Imai,Kenzaburo Iwadate,Takaaki Jike,Seiji Kameno,Osamu Kameya,Ryuichi Kamohara,Yukitoshi Kan-Ya,Noriyuki Kawaguchi,Masachika Kijima,Mi Kyoung Kim,Hideyuki Kobayashi,Seisuke Kuji,Tomoharu K URAYAMA,Toshihisa Maeda,Seiji Manabe,Kenta Maruyama,Makoto Matsui,Naoko Matsumoto,Takeshi M IYAJI,Takumi Nagayama,Kayoko Nakamura,Daisuke Nyu,Chung Sik Oh,Toshihiro Omodaka,Tomoaki O YAMA,Nicolas Pradel,Satoshi Sakai,Tetsuo S ASAO,Katsuhisa Sato,Mayumi Sato,Katsunori M. Shibata,Hiroshi Suda,Yoshiaki Tamura,Kousuke Ueda,Yuji U ENO,Kazuyoshi Yamashita

Publications of the Astronomical Society of Japan（2008）

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摘要
We present a distance measurement for the semiregular variable S Crateris (S Crt) based on its annual parallax. With the unique dual beam system of the VLBI Exploration for Radio Astrometry (VERA) telescopes, we measured the absolute proper motion of a water maser spot associated with S Crt, referred to the quasar J1147-0724 located at an angular separation of 1.23D. In observations spanning nearl...
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关键词
astrometry,masers (H2O),stars: AGB and post-AGB,stars: individual (S Crateris),stars: variables: other
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