Gravitational Wave Open Science Center

Data release for event GW170608

This page has been prepared by the LIGO Scientific Collaboration (LSC) and the Virgo Collaboration.

The event occurred at GPS time 1180922494.49 = June 08 2017, 02:01:16.49 UTC.

The event was observed by data from the LIGO Hanford (H1) and LIGO Livingston (L1) detectors.

Note: Virgo joined the O2 observing run on August 1st, 2017. At the time of the event the Advanced Virgo detector was in a commissioning phase in preparation for the O2 science run. The detector was operating with limited sensitivity. No fully characterized strain data from Virgo is available for this event


Gravitational-Wave Strain Data


Strain data after noise subtraction

After data collection, several independently-measured terrestrial contributions to the detector noise were subtracted from the LIGO data using Wiener filtering. This subtraction removed calibration lines and 60 Hz AC power mains harmonics from both LIGO data streams. At times near GW170608, the sensitivity of LIGO-Hanford was particularly improved by the subtraction of laser pointing noise; several broad peaks in the 150 - 800 Hz region were effectively removed, increasing the Binary Neutron Star horizon distance of that detector by typically 25%. For reference:

Notes:

Strain Data at 4096 Hz

Strain h(t) time series centered at GPS 1180922494.

H1 L1
32 seconds (event signal reaches peak amplitude 16.49 seconds ± 10 msec from start†) hdf5 gwf txt.gz hdf5 gwf txt.gz
512 seconds (event signal reaches peak amplitude 256.49 seconds ± 10 msec from start†) hdf5 gwf txt.gz hdf5 gwf txt.gz

Strain Data at 16384 Hz

Strain h(t) time series centered at GPS 1180922494.

H1 L1
32 seconds (event signal reaches peak amplitude 16.49 seconds ± 10 msec from start†) hdf5 gwf txt.gz hdf5 gwf txt.gz
512 seconds (event signal reaches peak amplitude 256.49 seconds ± 10 msec from start†) hdf5 gwf txt.gz hdf5 gwf txt.gz

† The ± 10 msec window for peak amplitude is due to different arrival time in each of the LIGO detectors.


Strain data before noise subtraction

These files contain data before noise subtraction. These data were produced in low-latency, and used by the search pipelines to evaluate event significance.

Notes:

Strain Data at 4096 Hz

Strain h(t) time series centered at GPS 1180922494.

H1 L1
32 seconds(event signal reaches peak amplitude 16.49 seconds ± 10 msec from start†) hdf5 gwf txt.gz hdf5 gwf txt.gz
4096 seconds(event signal reaches peak amplitude 2048.49 seconds ± 10 msec from start†) hdf5 gwf txt.gz hdf5 gwf txt.gz

Strain Data at 16384 Hz

Strain h(t) time series centered at GPS 1180922494.

H1 L1
32 seconds (event signal reaches peak amplitude 16.49 seconds ± 10 msec from start†) hdf5 gwf txt.gz hdf5 gwf txt.gz
4096 seconds (event signal reaches peak amplitude 2048.49 seconds ± 10 msec from start†) hdf5 gwf txt.gz hdf5 gwf txt.gz

† The ± 10 msec window for peak amplitude is due to different arrival time in each of the LIGO detectors.


Sky Localization

Source localization data for GW170608 are available as LIGO G1702263

Rapid triggers from LIGO data are available as GCN notices for GW170608


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