The 2006 Radio Outbursts of a Microquasar Cygnus X-3: Observations and Data

We present the results of multi-frequency observations of radio outbursts of the microquasar Cygnus X-3 in 2006 February and March with the Nobeyama 45-m telescope, the Nobeyama Millimeter Array, and the Yamaguchi 32-m telescope. Since the prediction of a flare by RATAN-600, the source was monitored...

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Published in:Publications of the Astronomical Society of Japan 2008-06, Vol.60 (3), p.465-473
Main Authors: Tsuboi, Masato, Tosaki, Tomoka, Kuno, Nario, Nakanishi, Kouichiro, Sawada, Tsuyoshi, Umemoto, Tomofumi, Trushkin, Sergei A., Kotani, Taro, Kawai, Nobuyuki, Kurono, Yasutaka, Handa, Toshihiro, Kohno, Kotaro, Tsukagoshi, Takashi, Kameya, Osamu, Kobayashi, Hideyuki, Fujisawa, Kenta, Doi, Akihiro, Omodaka, Toshihiro, Takaba, Hiroshi, Sudou, Hiroshi, Wakamatsu, Ken-ichi, Koyama, Yasuhiro, Kawai, Eiji, Mochizuki, Nanako, Murata, Yasuhiro
Format: Article
Language:English
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Summary:We present the results of multi-frequency observations of radio outbursts of the microquasar Cygnus X-3 in 2006 February and March with the Nobeyama 45-m telescope, the Nobeyama Millimeter Array, and the Yamaguchi 32-m telescope. Since the prediction of a flare by RATAN-600, the source was monitored from January 27 (UT) with these radio telescopes. At the eighteenth day after the quench of activity, successive flares exceeding 1Jy were successfully observed. The time scale of the variability in the active phase is presumably shorter in higher frequency bands. We also present the result of a follow-up VLBI observation at 8.4GHz with the Japanese VLBI Network 2.6d after the first rise. A VLBI image exhibits a single core with a size of $
ISSN:0004-6264
2053-051X
DOI:10.1093/pasj/60.3.465