Thermal-noise-limited underground interferometer CLIO (2009)
Agatsuma, Kazuhiro, Arai, Koji, Fujimoto, Masa-Katsu, Kawamura, Seiji, Kuroda, Kazuaki, Miyakawa, Osamu, ...
We report on the current status of CLIO (Cryogenic Laser Interferometer Observatory), which is a prototype interferometer for LCGT (Large scale Cryogenic Gravitational-wave Telescope). LCGT is a...
Direct Measurement of Thermal Fluctuation of High-Q Pendulum (2009)
Agatsuma, Kazuhiro, Uchiyama, Takashi, Yamamoto, Kazuhiro, Ohashi, Masatake, Kawamura, Seiji, Miyoki, Shinji, ...
We achieved for the first time a direct measurement of the thermal fluctuation of a pendulum in an off-resonant region using a laser interferometric gravitational wave detector. These measurements...
Ando, Masaki, Kawamura, Seiji, Sato, Shuichi, Nakamura, Takashi, Tsubono, Kimio, Araya, Akito, ...
DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory), which is a future space gravitational wave antenna. DECIGO is expected...
Tobar, Michael Edmund, Suzuki, Toshikazu, Kuroda, Kazuaki
In this paper we show that information on both the differential and common mode free-mass response to a gravitational wave can provide important information on discriminating the direction of the...
Ando, Masaki, Kawamura, Seiji, Nakamura, Takashi, Tsubono, Kimio, Tanaka, Takahiro, Funaki, Ikkoh, ...
DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory) which is a future space gravitational wave antenna. DECIGO is expected...
The Japanese space gravitational wave antenna; DECIGO (2008)
Kawamura, Seiji, Ando, Masaki, Nakamura, Takashi, Tsubono, Kimio, Tanaka, Takahiro, Funaki, Ikkoh, ...
DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese space gravitational wave antenna. DECIGO is expected to open a new window of observation for gravitational...
Yamamoto, Kazuhiro, Hayakawa, Hideaki, Okada, Atsushi, Uchiyama, Takashi, Miyoki, Shinji, Ohashi, Masatake, ...
We investigated the noise of interferometric gravitational wave detectors due to heat energy deposited by cosmic-ray particles. We derived a general formula that describes the response of a mirror...
Search for continuous gravitational waves from PSR J0835-4510 using CLIO data (2008)
Akutsu, Tomomi, Ando, Masaki, Haruyama, Tomiyoshi, Kanda, Nobuyuki, Kuroda, Kazuaki, Miyoki, Shinji, ...
We search for continuous gravitational waves from PSR J0835-4510 at twice its rotational frequency using CLIO (Cryogenic Laser Interferometric Observatory) in the Kamioka mine. In this search, we use...
Yamamoto, Kazuhiro, Hayakawa, Hideaki, Okada, Atsushi, Uchiyama, Takashi, Miyoki, Shinji, Ohashi, Masatake, ...
We investigated the noise of interferometric gravitational wave detectors due to heat energy deposited by cosmic-ray particles. We derived a general formula that describes the response of a mirror...
Ando, M., Kawamura, Seiji, Nakamura, T., Tsubono, K., Tanaka, T., Funaki, I., ...
DECIGO pathfinder (DPF) is a milestone satellite mission for DECIGO (DECi-hertz Interferometer Gravitational wave Observatory) which is a future space gravitational wave antenna. DECIGO is expected...
The Japanese space gravitational wave antenna: DECIGO (2008)
Kawamura, Seiji, Ando, M., Nakamura, T., Tsubono, K., Tanaka, T., Funaki, I., ...
DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese space gravitational wave antenna. DECIGO is expected to open a new window of observation for gravitational...
The Japanese space gravitational wave antenna - DECIGO (2008)
Kawamura, Seiji, Ando, M., Nakamura, T., Tsubono, K., Tanaka, T., Funaki, I., ...
DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese space gravitational wave antenna. The goal of DECIGO is to detect gravitational waves from various kinds of...
Yamamoto, Kazuhiro, Hayakawa, Hideaki, Okada, Atsushi, Uchiyama, Takashi, Miyoki, Shinji, Ohashi, Masatake, ...
Yoshiki
Tomaru, Takayuki, Tokunari, Masao, Kuroda, Kazuaki, Uchiyama, Takashi, Okutomi, Akira, Ohashi, Masatake, ...
A large heat load caused by thermal radiation through a metal shield pipe was observed in a cooling test of a cryostat for a prototype of a cryogenic interferometric gravitational wave detector. The...
Current status of Japanese detectors (2007)
Tatsumi, Daisuke, Takahashi, Ryutaro, Arai, Koji, Nakagawa, Noriyasu, Agatsuma, Kazuhiro, Yamazaki, Toshitaka, ...
Current status of TAMA and CLIO detectors in Japan is reported in this article. These two interferometric gravitational-wave detectors are being developed for the large cryogenic gravitational wave...
Yamamoto, Kazuhiro, Miyoki, Shinji, Uchiyama, Takashi, Ishitsuka, Hideki, Ohashi, Masatake, Kuroda, Kazuaki, ...
We have measured the mechanical loss of a dielectric multilayer reflective coating (ion-beam sputtered SiO$_2$ and Ta$_2$O$_5$) in cooled mirrors. The loss was nearly independent of the temperature...
Joint LIGO and TAMA300 search for gravitational waves from inspiralling neutron star binaries (2006)
Abbott, B., Abbott, R., Adhikari, R., Ageev, A., Agresti, Juri, Ajith, P., ...
We search for coincident gravitational wave signals from inspiralling neutron star binaries using LIGO and TAMA300 data taken during early 2003. Using a simple trigger exchange method, we perform an...
Akutsu, Tomomi, Akutsu, Tomotadu, Ando, Masaki, Arai, Koji, Araya, Akito, Asada, H., ...
We analyze the data of the TAMA300 detector to search for gravitational waves from inspiraling compact star binaries with masses of the component stars in the range 1M[sun]–3M[sun]. In this...
The Japanese space gravitational wave antenna - DECIGO (2006)
Kawamura, Seiji, Nakamura, T., Ando, M., Seto, N., Tsubono, K., Numata, K., ...
DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese space gravitational wave antenna. It aims at detecting various kinds of gravitational waves between 1 mHz and...
Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts (2005)
Abbott, B., Abbott, R., Adhikari, R., Ageev, A., Agresti, Juri, Ajith, P., ...
Ando, M., Arai, K., Aso, Y., Beyersdorf, P. T., Hayama, K., Iida, Y., ...
Tomaru, Takayuki, Miyoki, Shinji, Ohashi, Masatake, Kuroda, Kazuaki, Uchiyama, Takashi, Suzuki, Toshikazu, ...
We evaluated the performance of polished mirror surfaces for the TAMA interferometric gravitational wave detector by comparing the experimental results with a wave-front tracing simulation. The TAMA...
Thermal lensing in cryogenic sapphire substrates (2002)
Tomaru, Takayuki, Suzuki, Toshikazu, Miyoki, Shinji, Uchiyama, Takashi, Taylor, C. T., Yamamoto, Akira, ...
We report the reduction of the thermal lensing in cryogenic sapphire mirrors, which is planed to be used in the Large scale Cryogenic Gravitational wave Telescope (LCGT) project. We measured three...
Tomaru, Takayuki, Uchiyama, Takashi, Tatsumi, Daisuke, Miyoki, Shinji, Ohashi, Masatake, Kuroda, Kazuaki, ...
We have applied laser calorimetry to the measurement of optical absorption in mono-crystalline sapphire at cryogenic temperatures. Sapphire is a promising candidate for the mirror substrates of the...