Proc. IAU volume 13, issue S336, P45-48 2017 DOI: 10.1017/s1743921317011516 View full text
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Koichiro Sugiyama, Y. Yonekura, K. Motogi, Y. Saito, T. Yamaguchi, M. Momose, M. Honma, T. Hirota, M. Uchiyama, N. Matsumoto, K. Hachisuka, K. Inayoshi, K. E. I. Tanaka, T. Hosokawa et al.

Abstract: AbstractWe initiated a long-term and highly frequent monitoring project toward 442 methanol masers at 6.7 GHz (Dec >−30 deg) using the Hitachi 32-m radio telescope in December 2012. The observations have been carried out daily, monitoring a spectrum of each source with intervals of 9–10 days. In September 2015, the number of the target sources and intervals were redesigned into 143 and 4–5 days, respectively. This monitoring provides us complete information on how many sources show periodic flux variations …

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