Overview

This page provides the official strain sensitivity data of CHRONOS.

CHRONOS (Cryogenic sub-Hz cROss torsion-bar detector with quantum NOn-demolition Speed meter) is a cryogenic torsion-bar interferometer designed to explore the sub-Hz gravitational-wave band and stochastic gravitational-wave backgrounds.

The dataset distributed here corresponds to the total gravitational-wave strain noise amplitude spectral density (ASD):$$\sqrt{S_h(f)}[1\mathrm{/}\sqrt{\mathrm{H}\mathrm{z}}]$$S_h​(f)​[1/Hz​]

This curve represents the quadrature sum of all modeled noise sources in the current CHRONOS configuration.

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Download

Data file (ASCII format)

Columns:

Column	Quantity	Unit
1	Frequency $f$	Hz
2	Strain ASD $\sqrt{S_h(f)}$	1/√Hz

The file includes a header beginning with #, which can be ignored by most data-analysis tools.

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Data Description

• Frequency range: 0.05 Hz – 10 kHz
• Quantity: Total strain amplitude spectral density
• Detector configuration: Nominal CHRONOS design
• Model assumptions: Cryogenic torsion-bar configuration including quantum noise, thermal noise, seismic noise, and Newtonian noise contributions.

This dataset is intended for:

• Stochastic gravitational-wave background sensitivity studies
• Cosmological parameter forecasting
• Cross-correlation projections
• Detector comparison studies

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Citation Policy

If you use this dataset in scientific publications, please cite the following references.

CHRONOS White Paper

Y. Inoue et al.,
“CHRONOS: A Cryogenic Sub-Hz Torsion-Bar Speed-Meter for Stochastic Gravitational-Wave Background Searches.”
CHRONOS White Paper (2026).
will be released on 2026 Mar.11

CHRONOS Main Paper

Y. Inoue et al.,
“CHRONOS: Cryogenic sub-Hz cROss torsion bar detector with quantum NOn-demolition Speed meter”
arXiv: 2509.23172