%0 Journal Article
%T No Microwave Flare of Sagittarius A* around the G2 Periastron Passing
%A Masato Tsuboi
%A Yoshiharu Asaki
%A Osamu Kameya
%A Yoshinori Yonekura
%A Yusuke Miyamoto
%A Hiroyuki Kaneko
%A Masumichi Seta
%A Naomasa Nakai
%A Hiroshi Takaba
%A Ken-ichi Wakamatsu
%A Makoto Miyoshi
%A Yoshihiro Fukuzaki
%A Kenta Uehara
%A Mamoru Sekido
%J Physics
%D 2014
%I arXiv
%R 10.1088/2041-8205/798/1/L6
%X In order to explore any change caused by the G2 cloud approaching, we have monitored the flux density of Sgr A* at 22 GHz from Feb. 2013 to Aug. 2014 with a sub-array of Japanese VLBI Network . The observation period included the expected periastron dates. The number of observation epochs was 283 days. We have observed no significant microwave enhancement of Sgr A* in the whole observation period. The average flux density in the period is $S=1.23+/-0.33$ Jy. The average is consistent with the usually observed flux density range of Sgr A* at 22 GHz.
%U http://arxiv.org/abs/1411.0746v1