187 citations · 784 across the 23 of their papers we have counts for
24 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…
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…
Catalog of Gamma-ray Glows during Four Winter Seasons in Japan
Yuuki Wada, Takahiro Matsumoto, Teruaki Enoto +12
In 2015 the Gamma-Ray Observation of Winter Thunderstorms (GROWTH) collaboration launched a mapping observation campaign for high-energy atmospheric phenomena related to thundersto…
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…
Exponentially Decaying Extended Emissions Following Short Gamma-Ray Bursts with Possible Luminosity -- E-folding Time Correlation
Yasuaki Kagawa, Daisuke Yonetoku, Tatsuya Sawano +3
The origin of extended emissions following prompt emissions of short gamma-ray bursts (SGRBs) is in mystery. The long-term activity of the extended emission is responsible for prom…
Systematic study for gas-to-dust ratio of short gamma-ray burst afterglows
Kazuki Yoshida, Daisuke Yonetoku, Makoto Arimoto +2
Extra-galactic X-ray absorption and optical extinction are often found in gamma-ray burst (GRB) afterglows and they could be tracers of both circumburst and host galaxy environment…
Performance test of the MAIKo active target
T. Furuno, T. Kawabata, H. J. Ong +23
A new active target named MAIKo (Mu-PIC based Active target for Inverse Kinematics) has been developed at Kyoto University and Research Center for Nuclear Physics (RCNP),…
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…
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…
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…
Development of wide-field low-energy X-ray imaging detectors for HiZ-GUNDAM
Kazuki Yoshida, Daisuke Yonetoku, Tatsuya Sawano +9
We are planning a future gamma-ray burst (GRB) mission HiZ-GUNDAM to probe the early universe beyond the redshift of z > 7. Now we are developing a small prototype model of wide-fi…
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…
A performance study of an electron-tracking Compton camera with a compact system for environmental gamma-ray observation
Tetsuya Mizumoto, Dai Tomono, Atsushi Takada +12
An electron-tracking Compton camera (ETCC) is a detector that can determine the arrival direction and energy of incident sub-MeV/MeV gamma-ray events on an event-by-event basis. It…
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…
X-raying extended emission and rapid decay of short gamma-ray bursts
Yasuaki Kagawa, Daisuke Yonetoku, Tatsuya Sawano +5
Extended emission is a mystery in short gamma-ray bursts (SGRBs). By making time resolved spectral analyses of brightest nine events observed by XRT, we obviously cla…
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…
High-z gamma-ray bursts for unraveling the dark ages mission HiZ-GUNDAM
Daisuke Yonetoku, Tatehiro Mihara, Tatsuya Sawano +28
We are now investigating and studying a small satellite mission HiZ-GUNDAM for future observation of gamma-ray bursts (GRBs). The mission concept is to probe "the end of dark ages…
Short Gamma Ray Burst Formation Rate from BATSE data using E_p-L_p correlation and the minimum gravitational wave event rate of coalescing compact binary
Daisuke Yonetoku, Takashi Nakamura, Tatsuya Sawano +2
Using 72 Short Gamma Ray Bursts (SGRBs) with well determined spectral data observed by BATSE, we determine their redshift and the luminosity by applying -- correlation fo…
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…
Development of a Time-resolved Neutron Imaging Detector Based on the μPIC Micro-Pixel Chamber
Joseph D Parker, Masahide Harada, Kaori Hattori +19
We have developed a prototype time-resolved neutron imaging detector employing a micro-pattern gaseous detector known as the micro-pixel chamber (μPIC) coupled with a field-program…
Spatial resolution of a μPIC-based neutron imaging detector
Joseph D. Parker, Masahide Harada, Kaori Hattori +16
We present a detailed study of the spatial resolution of our time-resolved neutron imaging detector utilizing a new neutron position reconstruction method that improves both spatia…
Neutron imaging detector based on the muPIC micro-pixel chamber
J. D. Parker, K. Hattori, H. Fujioka +16
We have developed a prototype time-resolved neutron imaging detector employing the micro-pixel chamber (muPIC), a micro-pattern gaseous detector, coupled with a field programmable…
First underground results with NEWAGE-0.3a direction-sensitive dark matter detector
Kentaro Miuchi, Hironobu Nishimura, Kaori Hattori +17
A direction-sensitive dark matter search experiment at Kamioka underground laboratory with the NEWAGE-0.3a detector was performed. The NEWAGE- 0.3a detector is a gaseous micro-time…
The case for a directional dark matter detector and the status of current experimental efforts
S. Ahlen, N. Afshordi, J. B. R. Battat +109
We present the case for a dark matter detector with directional sensitivity. This document was developed at the 2009 CYGNUS workshop on directional dark matter detection, and conta…