Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Tsuneaki Daishido"'
Autor:
Kotaro Niinuma, Kimio Tsubono, Hirochika Nakajima, K. Asuma, Kazuhiro Takefuji, Tsuneaki Daishido, S. Kida, T. Aoki
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 of interferometer was developed to survey transient radio sources with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ac686cc441d5fe5eb1bc2bd68cca536
Autor:
Tsuneaki Daishido, K. Konishi, K. Asuma, T. Nakamizo, S. Kida, Kotaro Niinuma, T. Aoki, T. Tanaka
Publikováno v:
Publications of the Astronomical Society of the Pacific. 125:557-564
This article describes a rapid fringe detection technique for detecting fringes that appear transiently in Nasu observational data. It can quickly and accurately detect fringe waveforms that are not derived from steady sources in the drift-scan data
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6702f6c23cf7b1b4568aa15fee692521
https://doi.org/10.1086/670767
https://doi.org/10.1086/670767
Autor:
K. Asuma, N. Matsumura, T. Aoki, T. Tanaka, Kotaro Niinuma, Tsuneaki Daishido, A. Imai, R. Hiruma, T. Nakamizo, K. Takefuji, N. Furukawa, S. Kida
Publikováno v:
Publications of the Astronomical Society of the Pacific. 124:616-623
We have developed an analysis method for finding flux variabilities of the fringes in drift-scan interferometric data at 1.4 GHz obtained from the Nasu observatory. This method uses the expectation data of the Nasu observation generated from a radio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62cfc91323f39265f1109729260647f7
https://doi.org/10.1086/666592
https://doi.org/10.1086/666592
Autor:
N. Furukawa, Y. Yamada, S. Kida, T. Endo, K. Asuma, Kotaro Niinuma, T. Tanaka, R. Hiruma, Tsuneaki Daishido, T. Aoki, K. Konishi, J. Ikouga, T. Nakamizo, T. Tsuda, K. Odai
Publikováno v:
Publications of the Astronomical Society of the Pacific. 124:371-379
This article proposes a method for calculating the false-detection/alarm rate for the Nasu interferometric sky survey. This method considers both spectral intensity and time width of a fringe in the time-frequency domain. It detects periodic waves wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e84c53cda18c8e4f6e65d24a036c678
https://doi.org/10.1086/665596
https://doi.org/10.1086/665596
Autor:
H. Akamatsu, J. Ikouga, K. Tekefuji, K. Odai, Tsuneaki Daishido, N. Furukawa, H. Uehara, H. Miyata, R. Kodama, T. Aoki, Y. Takanashi, Y. Yamada, A. Otsubo, T. Tanaka, S. Nakagawa, N. Matsumura, Kotaro Niinuma, S. Kida, K. Asuma, N. Nakamizo, R. Hiruma, A. Imai
Publikováno v:
The Astrophysical Journal. 714:L36-L40
Radio variability was detected at 1.42 GHz from an area at the center of which a Fermi Large Area Telescope (LAT) bright source 0FGL J1847.8+3223 (B2 1846+32A) was located. The flux was detected using a two-element interferometer setup at the Waseda
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db6f618c5b31e3de5a3b8c0e92b1a76b
https://doi.org/10.1088/2041-8205/714/1/l36
https://doi.org/10.1088/2041-8205/714/1/l36
Autor:
Kazuhiro Takefuji, S. Kida, M. Kuniyoshi, H. Uehara, T. Aoki, S. Nakagawa, Kotaro Niinuma, K. Asuma, Tsuneaki Daishido, K. Hirano, S. Ishikawa, N. Matsumura, T. Tanaka
Publikováno v:
The Astrophysical Journal. 704:652-660
We report two new radio transients at high Galactic latitude, WJN J0951+3300 (α = 09h51m22s ± 10s, δ = 33°00' ± 0°.4, b = 50°542) and WJN J1039+3300 (α = 10h39m26s ± 10s, δ = 33°00' ± 0°.4, b = 60°585), which were detected by interferom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bf4776482fafffbae5ff296677a3145
https://doi.org/10.1088/0004-637x/704/1/652
https://doi.org/10.1088/0004-637x/704/1/652
Autor:
S. Ishikawa, Tsuneaki Daishido, M. Kuniyoshi, S. Nakagawa, K. Asuma, T. Aoki, N. Matsumura, Kotaro Niinuma, Kazuhiro Takefuji, S. Kida, T. Tanaka, K. Hirano
Publikováno v:
The Astronomical Journal. 138:787-795
In 2004, we started the Nasu 1.4 GHz wide-field survey to study the dynamic universe by simultaneously performing the surveillance of the wide-field sky. We have detected six radio transients with flux densities larger than 1 Jy. In this paper, we re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b3e281d71607c254ce7456fc49aad14
https://doi.org/10.1088/0004-6256/138/3/787
https://doi.org/10.1088/0004-6256/138/3/787
Autor:
M. Kuniyoshi, N. Matsumura, S. Kida, R. Nakanura, Kazuhiro Takefuji, Kotaro Niinuma, T. Tanaka, Tsuneaki Daishido, S. Suzuki
Publikováno v:
New Astronomy. 13:519-525
The Nasu Observatory, which is composed of eight 20 m elements, was constructed for observing radio transients over a wide field at 1400 MHz. We report on two radio transients detected in consecutive drift scanning observations at declination 32° ov
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10d5d3c1f7de78a183604e512517be96
https://doi.org/10.1016/j.newast.2008.01.009
https://doi.org/10.1016/j.newast.2008.01.009
Autor:
S. Suzuki, S. Ishikawa, K. Hirano, S. Kida, M. Kuniyoshi, T. Tanaka, Tsuneaki Daishido, R. Nakamura, Kazuhiro Takefuji, Kotaro Niinuma, N. Matsumura, K. Asuma, T. Aoki
Publikováno v:
Publications of the Astronomical Society of the Pacific. 120:339-347
We present results of two 1.4 GHz radio surveys of a +32° < δ < +42° area with four interferometers in the Nasu Radio-Transient Search Project. The observable area was 7.0% of the whole sky. The surveys were carried out between 2004 and 2005. All
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7bb1d9ca0515f3ac16f85a00a77abb4
https://doi.org/10.1086/529152
https://doi.org/10.1086/529152
Autor:
Tsuneaki Daishido, K. Asuma, Kotaro Niinuma, K. Hirano, K. Takefuji, T. Aoki, R. Nakamura, M. Kuniyoshi, S. Kida, N. Matsumura, S. Suzuki, S. Isikawa, T. Tanaka
Publikováno v:
Publications of the Astronomical Society of the Pacific. 119:1145-1151
We have developed a new technique, called quick-look data analysis, for radio transient searches at the Nasu Interferometer. Quick-look data, a color map according to the radio source signal-to-noise ratio (S/N), were generated spatially and temporal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d3d137a72fdd677fc1745b01faaf287
https://doi.org/10.1086/522207
https://doi.org/10.1086/522207