214 citations · 3.3k across the 73 of their papers we have counts for
4 papers · 2 filters
Japanese VLBI Network
Akihiro Doi, Kenta Fujisawa, Keiichiro Harada +15
We present the basic features and the activities of Japanese VLBI network (JVN), a newly-established VLBI network with baselines ranging from 50 to 2560 km spreading across the Jap…
VLBI observations of the most radio-loud, narrow-line quasar SDSS J094857.3+002225
Akihiro Doi, Hiroshi Nagai, Keiichi Asada +3
We observed the narrow-line quasar SDSS J094857.3+002225, which has the highest known radio loudness for a narrow-line Seyfert~1 galaxy (NLS1), at 1.7--15.4 GHz with the Very Long…
The Kinematic and Spectral Ages of the Compact Radio Source CTD 93
Hiroshi Nagai, Makoto Inoue, Keiichi Asada +2
We present a study of the kinematic and spectral ages of the Gigahertz-Peaked Spectrum (GPS) source CTD~93. Measurements of the hot spot separation over 8.5 yr show evidence of an…
Bigradient Phase Referencing
Akihiro Doi, Kenta Fujisawa, Asao Habe +7
We propose bigradient phase referencing (BPR), a new radio-observation technique, and report its performance using the Japanese very-long-baseline-interferometry network (JVN). In…