245 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Gifu UniversityJP2 papers
- Institute of Space and Astronautical ScienceJP2 papers
- Japan Aerospace Exploration AgencyJP2 papers
- National Astronomical Observatory of JapanJP2 papers
- National Institute of Information and Communications TechnologyJP2 papers
- The University of TokyoJP2 papers
- Chalmers University of TechnologySE1 paper
- Hokkaido UniversityJP1 paper
- Ibaraki UniversityJP1 paper
- Japan Science and Technology AgencyJP1 paper
- Kagoshima UniversityJP1 paper
- Korea Astronomy and Space Science InstituteKR1 paper
4 papers
Observing UT1-UTC with VGOS
Rüdiger Haas, Eskil Varenius, Saho Matsumoto +1
We present first results of UT1-UTC determinations using the VLBI Global Observing System (VGOS). During December 2019 through February 2020 a series of 1~hour long observing sessi…
Real-time geopotentiometry with synchronously linked optical lattice clocks
Tetsushi Takano, Masao Takamoto, Ichiro Ushijima +7
According to the Einstein's theory of relativity, the passage of time changes in a gravitational field. On earth, raising a clock by one centimetre increases its tick rate by 1.1 p…
No Microwave Flare of Sagittarius A* around the G2 Periastron Passing
Masato Tsuboi, Yoshiharu Asaki, Osamu Kameya +11
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 V…
Japanese VLBI Network observations of radio-loud narrow-line Seyfert 1 galaxies
Akihiro Doi, Kenta Fujisawa, Makoto Inoue +20
We performed phase-reference very long baseline interferometry (VLBI) observations on five radio-loud narrow-line Seyfert 1 galaxies (NLS1s) at 8.4 GHz with the Japanese VLBI Netwo…