There is a lot more data than simply that figure on Wikipedia. For example, you may download all of the raw gravitational wave strain data and re-analyze it yourself if you felt so inclined. The LIGO community has done an amazing job with the "open science center" that releases both the timeseries data and tools useful in processing it.
https://www.gw-openscience.org/about/
There are eleven peer-reviewed published papers on this event, in addition to a complete public release of the time series data.
https://www.ligo.caltech.edu/page/detection-companion-papers