Speaker
Description
KAGRA gravitational wave telescope in Japan started the 4th international gravitational wave observation(O4) with Advanced-LIGO and Advanced Virgo in May 2023, after repairs, upgrades, and commissioning for 3 years from May 2020. Under the LIGO-Virgo-KAGRA(LVK) O4 scenario, KAGRA restarted its commissioning from July 2023 to upgrade and improve its sensitivity and to rejoin O4 around Spring 2024. However, the magnitude 7.4 Noto Peninsula earthquake severely damaged 10 out of 20 mirror suspension systems, along with other detector components. Recovery efforts began immediately after the earthquake and were completed in July 2024. Thanks to 11 months of dedicated commissioning work, KAGRA achieved a binary neutron star (BNS) range of up to 6.9 Mpc and is officially rejoining O4 in June 2025. In this presentation, we report on the recovery process, upgrades, and commissioning efforts at KAGRA for O4, as well as a portion of the current observational status.
| Collaboration you are representing | KAGRA Collaboration |
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