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Innermost collimation structure of the M87 jet down to ~ten Schwarzschild radii
Kazuhiro Hada, Motoki Kino, Akihiro Doi +6
We investigated the detailed inner jet structure of M87 using the Very Long Baseline Array data at 2, 5, 8.4, 15, 23.8, 43, and 86 GHz, especially focusing on the multi-frequency p…
The kinematic of HST-1 in the jet of M87
M. Giroletti, K. Hada, G. Giovannini +9
Aims: We aim to constrain the structural variations within the HST-1 region downstream of the radio jet of M87, in general as well as in connection to the episodes of activity at v…
The 2010 very high energy gamma-ray flare & 10 years of multi-wavelength observations of M 87
The H. E. S. S. Collaboration, :, A. Abramowski +442
Abridged: The giant radio galaxy M 87 with its proximity, famous jet, and very massive black hole provides a unique opportunity to investigate the origin of very high energy (VHE;…
Global e-VLBI observations of the gamma-ray narrow line Seyfert 1 PMN J0948+0022
M. Giroletti, Z. Paragi, H. Bignall +16
There is growing evidence of relativistic jets in radio-loud narrow-line Seyfert 1 (RL-NLS1) galaxies. We constrain the observational properties of the radio emission in the first…
The first scientific experiment using Global e-VLBI observations: a multiwavelength campaign on the gamma-ray Narrow-Line Seyfert 1 PMN J0948+0022
Marcello Giroletti, Z. Paragi, H. Bignall +14
The detection of gamma-ray emission by Fermi-LAT from the radio loud Narrow Line Seyfert 1 PMN J0948+0022 (Abdo et al. 2009, ApJ 699, 976) triggered a multi-wavelength campaign bet…
VLBI Monitoring of 3C 84 in Gamma-ray Active Phase
H. Nagai, K. Suzuki, K. Asada +5
We report multi-epoch Very Long Baseline Interferometry (VLBI) study of the innermost jet of 3C 84. We carried out 14-epoch VLBI observations during 2006-2009 with the Japanese VLB…
Evidence of non-thermal X-ray emission from radio lobes of Cygnus A
Y. Yaji, M. S. Tashiro, N. Isobe +5
Using deep Chandra ACIS observation data for Cygnus A, we report evidence of non-thermal X-ray emission from radio lobes surrounded by a rich intra-cluster medium (ICM). The diffus…