KAGRA's Pcal system achieved 0.79% total uncertainty in O4, with laser power sensors and beam positions identified as dominant contributors.
Overview of KAGRA: Calibration, detector characterization, physical environmental monitors, and the geophysics interferometer
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Photon Calibration Performance of KAGRA during the 4th Joint Observing Run (O4)
KAGRA's Pcal system achieved 0.79% total uncertainty in O4, with laser power sensors and beam positions identified as dominant contributors.