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Overview of KAGRA: Calibration, detector characterization, physical environmental monitors, and the geophysics interferometer

Akutsu, T., Ando, M., Arai, K., Arai, Y., Araki, S., Araya, A., Aritomi, N., Asada, H., Aso, Y., Bae, S., Bae, Y., Baiotti, L., Bajpai, R., Barton, M. A., Cannon, K., Cao, Z., Capocasa, E., Chan, M., Chen, C., Chen, K., Chen, Y., Chiang, C.-Y., Chu, H., Chu, Y.-K., Eguchi, S., Enomoto, Y., Flaminio, R., Fujii, Y., Fujikawa, Y., Fukunaga, M., Fukushima, M., Gao, D., Ge, G., Ha, S., Hagiwara, A., Haino, S., Han, W.-B., Hasegawa, K., Hattori, K., Hayakawa, H.., Hayama, K., Himemoto, Y., Hiranuma, Y., Hirata, N., Hirose, E., Hong, Z., Hsieh, B., Huang, G.-Z., Huang, H.-Y., Huang, P., Huang, Y.-C., Huang, Y., Hui, D. C. Y., Ide, S., Ikenoue, B., Imam, S., Inayoshi, K., Inoue, Y., Ioka, K., Ito, K., Itoh, Y., Izumi, K., Jeon, C., Jin, H.-B., Jung, K., Jung, P., Kaihotsu, K., Kajita, T., Kakizaki, M., Kamiizumi, M., Kanda, N., Kang, G., Kawaguchi, K., Kawai, N., Kawasaki, T., Kim, C., Kim, J., Kim, J. C., Kim, W. S., Kim, Y.-M., Kimura, N., Kita, N., Kitazawa, H., Kojima, Y., Kokeyama, K. ORCID:, Komori, K., Kong, A. K. H., Kotake, K., Kozakai, C., Kozu, R., Kumar, R., Kume, J., Kuo, C., Kuo, H.-S., Kuromiya, Y., Kuroyanagi, S., Kusayanagi, K., Kwak, K., Lee, H. K., Lee, H. W., Lee, R., Leonardi, M., Li, K. L., Lin, L. C.-C., Lin, C.-Y., Lin, F.-K., Lin, F.-L., Lin, H. L., Liu, G. C., Luo, L.-W., Majorana, E., Marchio, M., Michimura, Y., Mio, N., Miyakawa, O., Miyamoto, A., Miyazaki, Y., Miyo, K., Miyoki, S., Mori, Y., Morisaki, S., Moriwaki, Y., Nagano, K., Nagano, S., Nakamura, K., Nakano, H., Nakano, M., Nakashima, R., Nakayama, Y., Narikawa, T., Naticchioni, L., Negishi, R., Nguyen Quynh, L., Ni, W.-T, Nishizawa, A., Nozaki, S., Obuchi, Y., Ogaki, W., Oh, J. J., Oh, K., Oh, S. H., Ohashi, M., Ohishi, N., Ohkawa, M., Ohta, H., Okutani, Y., Okutomi, K., Oohara, K., Ooi, C., Oshino, S., Otabe, S., Pan, K., Pang, H., Parisi, A., Park, J., Peña Arellano, F. E., Pinto, I., Sago, N., Saito, S., Saito, Y., Sakai, K., Sakai, Y., Sakuno, Y., Sato, S., Sato, T., Sawada, T., Sekiguchi, T., Sekiguchi, Y., Shao, L., Shibagaki, S., Shimizu, R., Shimoda, T., Shimode, K., Shinkai, H., Shishido, T., Shoda, A., Somiya, K., Son, E. J., Sotani, H., Sugimoto, R., Suresh, J., Suzuki, T., Suzuki, T., Tagoshi, H., Takahashi, H., Takahashi, R., Takamori, A., Takano, S., Takeda, H., Takeda, M., Tanaka, H., Tanaka, K., Tanaka, K., Tanaka, T., Tanaka, T., Tanioka, S., Tapia San Martin, E. N., Telada, S., Tomaru, T., Tomigami, Y., Tomura, T., Travasso, F., Trozzo, L., Tsang, T., Tsao, J.-S., Tsubono, K., Tsuchida, S., Tsutsui, T., Tsuzuki, T., Tuyenbayev, D., Uchikata, N., Uchiyama, T., Ueda, A., Uehara, T., Ueno, K., Ueshima, G., Uraguchi, F., Ushiba, T., van Putten, M. H. P. M., Vocca, H., Wang, J., Washimi, T., Wu, C., Wu, H., Wu, S., Xu, W.-R., Yamada, T., Yamamoto, K., Yamamoto, K., Yamamoto, T., Yamashita, K., Yamazaki, R., Yang, Y., Yokogawa, K., Yokoyama, J., Yokozawa, T., Yoshioka, T., Yuzurihara, H., Zeidler, S., Zhan, M., Zhang, H., Zhao, Y. and Zhu, Z.-H. 2021. Overview of KAGRA: Calibration, detector characterization, physical environmental monitors, and the geophysics interferometer. Progress of Theoretical and Experimental Physics 2021 (5) , 05A102. 10.1093/ptep/ptab018

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KAGRA is a newly built gravitational wave observatory, a laser interferometer with a 3 km arm length, located in Kamioka, Gifu, Japan. In this series of articles, we present an overview of the baseline KAGRA, for which we finished installing the designed configuration in 2019. This article describes the method of calibration (CAL) used for reconstructing gravitational wave signals from the detector outputs, as well as the characterization of the detector (DET). We also review the physical environmental monitors (PEM) system and the geophysics interferometer (GIF). Both are used for characterizing and evaluating the data quality of the gravitational wave channel. They play important roles in utilizing the detector output for gravitational wave searches. These characterization investigations will be even more important in the near future, once gravitational wave detection has been achieved, and in using KAGRA in the gravitational wave astronomy era.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Additional Information: This is an Open Access article distributed under the terms of the Creative Commons Attribution License (
Publisher: Oxford University Press
ISSN: 2050-3911
Date of First Compliant Deposit: 19 March 2021
Date of Acceptance: 9 February 2021
Last Modified: 05 May 2023 10:25

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