Daily monitor of Sagittarius A* at 22 GHz with the Japanese VLBI Network

Authors :: Yoshihiro Fukuzaki
Yusuke Miyamoto
Hiroshi Takaba
Yoshinori Yonekura
Y. Asaki
Toshihiro Omodaka
Mamoru Sekido
Shunya Takekawa
Tomoharu Oka
Masumichi Seta
Naomasa Nakai
Makoto Miyoshi
A. Takumi
Hiroyuki Kaneko
Kenta Uehara
Ken-Ichi Wakamatsu
Osamu Kameya
Toshihiro Handa
T. Morimitsu
Masato Tsuboi
Source :: Proceedings of the International Astronomical Union. 9:382-384
Publication Year :: 2013
Publisher :: Cambridge University Press (CUP), 2013.
Abstract: We have been monitoring the flux density of Sagittarius A* (Sgr A*) at 22 GHz since DOY=42 (11 Feb. 2013) with a sub-array of the Japanese VLBI Network in order to search the increase of 22-GHz emission from Sgr A* induced by the interaction of the G2 cloud with the accretion disk. The flux densities observed until DOY=322 (18 Nov. 2013) are consistent with the previously observed values before the approaching of the cloud. We have detected no large flare during this period.