93 citations · 347 across the 18 of their papers we have counts for
19 papers
Three-dimensional recoil-electron reconstruction using combined optical imaging and waveform readout for electron-tracking Compton cameras
Tomonori Ikeda, Tatsuya Sawano, Naomi Tsuji +1
Accurate reconstruction of recoil-electron directions is critical for enhancing the point-spread function of electron-tracking Compton cameras (ETCCs) in gamma-ray imaging. Althoug…
Observation of Galactic center in the sub-MeV gamma-ray band with electron-tracking Compton camera
Tomonori Ikeda, Toru Tanimori, Atsushi Takada +6
We report the direct detection of gamma-ray emission from the Galactic center in the 150-600 keV band using the electron-tracking Compton camera (ETCC), which has a wide field of v…
Systematic Biases from ARM-Based Sensitivity and Imaging in Compton Cameras
Tomonori Ikeda, Tatsuya Sawano, Naomi Tsuji +1
The angular resolution measure (ARM) is widely used in Compton camera analyses to characterize angular uncertainty and to define event selection criteria. However, the ARM distribu…
High-energy extension of the gamma-ray band observable with an electron-tracking Compton camera
Tomohiko Oka, Shingo Ogio, Mitsuru Abe +12
Although the MeV gamma-ray band is a promising energy-band window in astrophysics, the current situation of MeV gamma-ray astronomy significantly lags behind those of the other ene…
Development of Convolutional Neural Networks for an Electron-Tracking Compton Camera
Tomonori Ikeda, Atsushi Takada, Mitsuru Abe +7
Electron-tracking Compton camera, which is a complete Compton camera with tracking Compton scattering electron by a gas micro time projection chamber, is expected to open up MeV ga…
First observation of MeV gamma-ray universe with bijective imaging spectroscopy using the Electron-Tracking Compton Telescope aboard SMILE-2+
Atsushi Takada, Taito Takemura, Kei Yoshikawa +12
MeV gamma-rays provide a unique window for the direct measurement of line emissions from radioisotopes, but observations have made little significant progress after COMPTEL/{\it CG…
Systematic Study of Nuclear Gamma-Ray Spectra of One Hundred Super Novae Expected by Future Nuclear Gamma-Ray Imaging Spectroscopic Observations
Yoshitaka Mizumura, Atsushi Takada, Toru Tanimori
Supernovae (SNe) are the most fascinating objects in astronomy and are intensely investigated. However, many mysteries such as nucleosynthesis and the origin of SNe Ia remain unsol…
Imaging Polarimeter for a Sub-MeV Gamma-Ray All-Sky Survey using an Electron-Tracking Compton Camera
Shotaro Komura, Atsushi Takada, Yoshitaka Mizumura +17
X-ray and gamma-ray polarimetry is a promising tool to study the geometry and the magnetic configuration of various celestial objects, such as binary black holes or gamma-ray burst…
First On-Site True Gamma-Ray Imaging-Spectroscopy of Contamination near Fukushima Plant
Dai Tomono, Tetsuya Mizumoto, Atsushi Takada +5
We have developed an Electron Tracking Compton Camera (ETCC), which provides a well-defined Point Spread Function (PSF) by reconstructing a direction of each gamma as a point and r…
Establishment of Imaging Spectroscopy of Nuclear Gamma-Rays based on Geometrical Optics
Toru Tanimori, Yoshitaka Mizumura, Atsushi Takada +16
Since the discovery of nuclear gamma-rays, its imaging has been limited to pseudo imaging, such as Compton Camera (CC) and coded mask. Pseudo imaging does not keep physical informa…
Possibility of Systematic Study of Supernova Explosions by Nuclear Imaging Spectroscopy
Yoshitaka Mizumura, Toru Tanimori, Atsushi Takada
An all-sky monitor with nuclear imaging spectroscopy is a promising tool for the systematic study of supernova explosions. In particular, progenitor scenarios of type-Ia supernovae…
Readout technologies for directional WIMP Dark Matter detection
J. B. R. Battat, I. G. Irastorza, A. Aleksandrov +90
The measurement of the direction of WIMP-induced nuclear recoils is a compelling but technologically challenging strategy to provide an unambiguous signature of the detection of Ga…
New readout and data-acquisition system in an electron-tracking Compton camera for MeV gamma-ray astronomy (SMILE-II)
Tetsuya Mizumoto, Yoshihiro Matsuoka, Yoshitaka Mizumura +17
For MeV gamma-ray astronomy, we have developed an electron-tracking Compton camera (ETCC) as a MeV gamma-ray telescope capable of rejecting the radiation background and attaining t…
An Electron-Tracking Compton Telescope for a Survey of the Deep Universe by MeV gamma-rays
T. Tanimori, H. Kubo, A. Takada +17
Photon imaging for MeV gammas has serious difficulties due to huge backgrounds and unclearness in images, which are originated from incompleteness in determining the physical param…
Performance of a new electron-tracking Compton camera under intense radiations from a water target irradiated with a proton beam
Yoshihiro Matsuoka, T. Tanimori, H. Kubo +16
We have developed an electron-tracking Compton camera (ETCC) for use in next-generation MeV gamma ray telescopes. An ETCC consists of a gaseous time projection chamber (TPC) and pi…
Development of a 30 cm-cube Electron-Tracking Compton Camera for the SMILE-II Experiment
Y. Mizumura, T. Tanimori, H. Kubo +16
To explore the sub-MeV/MeV gamma-ray window for astronomy, we have developed the Electron-Tracking Compton Camera (ETCC), and carried out the first performance test at room conditi…
Searches for very high energy gamma rays from blazars with CANGAROO-III telescope in 2005-2009
Y. Mizumura, J. Kushida, K. Nishijima +28
We have searched for very high energy (VHE) gamma rays from four blazars using the CANGAROO-III imaging atmospheric Cherenkov telescope. We report the results of the observations o…
CANGAROO-III observation of TeV gamma rays from the unidentified gamma-ray source HESS J1614-518
T. Mizukami, H. Kubo, T. Yoshida +46
We report the detection, with the CANGAROO-III imaging atmospheric Cherenkov telescope array, of a very high energy gamma-ray signal from the unidentified gamma-ray source HESS J16…
CANGAROO-III Observation of TeV Gamma Rays from the vicinity of PSR B1 706-44
R. Enomoto, J. Kushida, T. Nakamori +50
Observation by the CANGAROO-III stereoscopic system of the Imaging Cherenkov Telescope has detected extended emission of TeV gamma rays in the vicinity of the pulsar PSR B170644…