Gravitational Wave Open Science Center

The O3GK Data Release

Run Overview

  • The O3GK data set includes data only from the GEO 600 and KAGRA detectors
  • O3GK dates: 7th April 2020 8:00 UTC (GPS 1270281618) to 21st April 2020 0:00 UTC (GPS 1271462418)
  • Data are available from two detectors: G1 and K1
  • Data are available at the original 16 KHz and the downsampled 4 KHz sample rates.

Get O3GK Data

  • For KAGRA, non-science-mode times used for analysis of GRB200415A:
    [1270973517, 1270974580]
    [1270975068, 1270975162]
    [1270975168, 1270976433]

GWF Channel Names

The final version of the strain data, available using the buttons above, is sourced from the channels:

Associated Papers

  • First joint observation by the underground gravitational-wave detector, KAGRA, with GEO 600 (DCC link)
  • Noise budgets for KAGRA (arXiv link)

Data Quality Segments

Download Segments

Hardware Injections

No injections were performed during O3GK.

Instrumental Spectral Lines

Representative ASDs

  • Representative GEO 600 ASD
  • Representative KAGRA ASD

    • The above plot for KAGRA is reproduced from Figure 1 of the O3GK paper

    Technical Details

    GWOSC 4 kHz strain data have been repackaged and downsampled from 16384 Hz to 4096 Hz. KAGRA data are not calibrated or valid below 30 Hz or above 1500 Hz, and the data sampled at 4096 Hz are not valid above about 1500 Hz. GEO 600 data are not calibrated or valid below 40 Hz or above 6000 Hz, and the data sampled at 4096 Hz are not valid above about 1620 Hz. Thus, KAGRA (GEO 600) data should not be used below 30 Hz (40 Hz). In most searches for astrophysical sources, data below 20 Hz are not used because the noise is too high. More detailed information about the data set can be seen on the technical details page.


    To acknowledge the use of O3GK data, see the Acknowledgement Page.

    Data Set DOI:

    Revision History
    • March 3, 2022: First release
    • March 15, 2022: Updated links in the section Associated Papers