27 citations · 130 across the 14 of their papers we have counts for
14 papers
One-week optical observations of pulsed emission from the Crab pulsar with IMONY on the 3.8 m Seimei telescope
Kazuaki Hashiyama, Takeshi Nakamori, Anju Sato +13
We report our optical observations of the Crab pulsar using the Imager of MPPC-based Optical photoN counter from Yamagata (IMONY), a high-time-resolution photon-counting imager wit…
Detection of a bright burst from the repeating FRB 20201124A at 2 GHz
Sota Ikebe, Kazuhiro Takefuji, Toshio Terasawa +14
We present a detection of a bright burst from FRB 20201124A, which is one of the most active repeating FRBs, based on S-band observations with the 64-m radio telescope at the Usuda…
Multi-frequency radio observations of the radio-loud magnetar XTE J1810-197
Sujin Eie, Toshio Terasawa, Takuya Akahori +11
We report on the multi-frequency multi-epoch radio observations of the magnetar, XTE J1810-197, which exhibited a radio outburst from December 2018 after its 10-year quiescent peri…
Enhanced X-ray Emission Coinciding with Giant Radio Pulses from the Crab Pulsar
Teruaki Enoto, Toshio Terasawa, Shota Kisaka +34
Giant radio pulses (GRPs) are sporadic bursts emitted by some pulsars, lasting a few microseconds. GRPs are hundreds to thousands of times brighter than regular pulses from these s…
Observations of V404 Cygni during the 2015 outburst by the Nasu telescope array at 1.4 GHz
Kuniyuki Asuma, Kotaro Niinuma, Kazuhiro Takefuji +5
Waseda University Nasu telescope array is a spatial fast Fourier transform (FFT) interferometer consisting of eight linearly aligned antennas with 20 m spherical dishes. This type…
Optimum Frequency of Faraday Tomography to Explore the Inter-Galactic Magnetic Field in Filaments of Galaxies
Takuya Akahori, Shinsuke Ideguchi, Takahiro Aoki +3
Faraday tomography is thought to be a powerful tool to explore cosmic magnetic field. Broadband radio polarimetric data is essential to ensure the quality of Faraday tomography, bu…
Development of the Phase-up Technology of the Radio Telescopes: 6.7 GHz Methanol Maser Observations with Phased Hitachi 32 m and Takahagi 32 m Radio Telescopes
Kazuhiro Takefuji, Koichiro Sugiyama, Yoshinori Yonekura +3
For the sake of high-sensitivity 6.7 GHz methanol maser observations, we developed a new technology for coherently combining the two signals from the Hitachi 32 m radio telescope a…
Hitomi X-ray studies of Giant Radio Pulses from the Crab pulsar
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +201
To search for giant X-ray pulses correlated with the giant radio pulses (GRPs) from the Crab pulsar, we performed a simultaneous observation of the Crab pulsar with the X-ray satel…
VLBI ecliptic plane survey: VEPS-1
Fengchun Shu, Leonid Petrov, Wu Jiang +12
We present here the results of the first part of the VLBI Ecliptic Plane Survey (VEPS) program. The goal of the program is to find all compact sources within of the ecl…
Wide-Band Spectra of Giant Radio Pulses from the Crab Pulsar
Ryo Mikami, Katsuaki Asano, Shuta J. Tanaka +9
We present the results of the simultaneous observation of the giant radio pulses (GRPs) from the Crab pulsar at 0.3, 1.6, 2.2, 6.7, and 8.4 GHz with four telescopes in Japan. We ob…
Development of cross-correlation spectrometry and the coherent structures of maser sources
Kazuhiro Takefuji, Hiroshi Imai, Mamoru Sekido
We have developed a new method of data processing for radio telescope observation data to measure time-dependent temporal coherence, and we named it cross-correlation spectrometry…
Very Long Baseline Interferometry Experiment on Giant Radio Pulses of Crab Pulsar toward Fast Radio Burst Detection
K. Takefuji, T. Terasawa, T. Kondo +6
We report on a very long baseline interferometry (VLBI) experiment on giant radio pulses (GPs) from the Crab pulsar in the radio 1.4 to 1.7 GHz range to demonstrate a VLBI techniqu…
Progress on VLBI Ecliptic Plane Survey
Fengchun Shu, Leonid Petrov, Wu Jiang +5
We launched the VLBI Ecliptic Plane Survey program in 2015. The goal of this program is to find all compact sources within 7.5 degrees of the ecliptic plane which are suitable as p…
Search for a correlation between giant radio pulses and hard X-ray emissions in the Crab pulsar
Ryo Mikami, Toshio Terasawa, Shota Kisaka +12
We present the results of the search for a correlation between giant radio pulses (GRPs) at 1.4 GHz and hard X-rays at 15-75 keV from the Crab pulsar. We made simultaneous ground a…