The O2 Data Release
- O2 dates: 2016 Nov 30th 16:00 UTC (GPS 1164556817) to 2017 Aug 25th 22:00 UTC (GPS 1187733618)
- Data are available from three detectors, H1, L1 and V1 (Virgo data began Aug 1st, 2017)
- For Virgo, data around the event GW170729 have also been released and they can be found here
- The O2 data set is available at the original 16 KHz and the downsampled 4KHz sample rates.
- This is the first observing run that includes both Advanced LIGO and Advanced Virgo data.
Get O2 Data
GWF Channel Names
See the technical details page
for the channel names used in the O2 4KHZ and 16KHz GWF files (ending with extension .gwf).
These are new channel names that are different than those used in S5, S6 and O1 4KHz GWF files.
O2 Detector Status
Details about the status of LIGO and Virgo detectors in O2 can be found in the GWTC-1 Catalog paper
or in this web page
O2 astrophysical results are tabulated in the GWTC-1 catalog
describes 11 compact object mergers found in O1 and O2. An overview of compact binary coalescence results in O2 detections can be found
- GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs
- Parameter estimation sample release for GWTC-1,
- Binary Black Hole Population Properties Inferred from the First and Second Observing Runs of Advanced LIGO and Advanced Virgo,
For a full list of papers by the LSC and Virgo collaborations, see:
and for a list of discovery papers, see:
Data Quality Segments
A number of categories of data quality segments are available for the O2 data set. For example:
For information on how to use data quality segments, please see the technical details page
The O2 data set contains simulated astrophysical signals, known as hardware injections, used for testing and calibration.
For an example, see the Find a Hardware Injection Tutorial
For complete documentation, see:
Instrumental Spectral Lines
A power spectral density of LIGO data typically shows a number of spectral lines. Many of these are associated with known instrumental resonances.
The O2 instrumental spectral lines page
gives an explanation, and catalog, of
these instrumental lines.
GWOSC 4KHz strain data have been
from 16384 Hz to 4096 Hz.
Advanced LIGO and advanced Virgo data are not calibrated or valid below 10 Hz or above 5 kHz, and the data sampled at 4096 Hz are not valid above about 1700 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
Background data for GW170608
Additional O2 data are available in
the GW170608 background data set
To acknowledge the use of O2 data, see the Acknowledgement Page
Data Set DOI: https://doi.org/10.7935/CA75-FM95
- Dec 10, 2018: First Draft of Page
- February 27, 2019: First release
- May 31, 2019: Add link to GW170608 background data