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VERA and ALMA Observations of the H2O Supermaser Burst in Orion KL
Tomoya Hirota, Masato Tsuboi, Yasutaka Kurono +5
The 22 GHz H2O maser in Orion KL has shown extraordinary burst events in 1979-1985 and 1998-1999, sometimes called supermaser. We have conducted monitoring observations of the supe…
Super-resolution imaging with radio interferometer using sparse modeling
Mareki Honma, Kazunori Akiyama, Makoto Uemura +1
We propose a new technique to obtain super-resolution images with radio interferometer using sparse modeling. In standard radio interferometry, sampling of (, ) is quite ofte…
VLBI observations of bright AGN jets with KVN and VERA Array (KaVA): Evaluation of Imaging Capability
Kotaro Niinuma, Sang-Sung Lee, Motoki Kino +69
The Korean very-long-baseline interferometry (VLBI) network (KVN) and VLBI Exploration of Radio Astrometry (VERA) Array (KaVA) is the first international VLBI array dedicated to hi…
Trigonometric Parallax of IRAS 22555+6213 with VERA: 3-Dimensional View of Sources Along the Same Line of Sight
James O. Chibueze, Hirofumi Sakanoue, Takumi Nagayama +11
We report the results of the measurement of the trigonometric parallax of an HO maser source in \r22 with the VLBI Exploration of Radio Astrometry (VERA). The annual parallax w…
The First Very Long Baseline Interferometry Image of 44 GHz Methanol Maser with the KVN and VERA Array (KaVA)
Naoko Matsumoto, Tomoya Hirota, Koichiro Sugiyama +58
We have carried out the first very long baseline interferometry (VLBI) imaging of 44 GHz class I methanol maser (7_{0}-6_{1}A^{+}) associated with a millimeter core MM2 in a massiv…
VLBI Astrometry of AGB Variables with VERA -- A Mira Type Variable T Lepus
Akiharu Nakagawa, Toshihiro Omodaka, Toshihiro Handa +9
We conducted phase referencing VLBI observations of the Mira variable T~Lepus (T~Lep) using VERA, from 2003 to 2006. The distance to the source was determined from its annual paral…