Gravitational-wave detection of the largest black hole merger observed to date. Columns depict the event as seen by LIGO Hanford, LIGO Livingston, and Virgo. Top: signal vs time; bottom: frequency vs time. Selected for a Viewpoint in Physics and an Editors’ Suggestion.

From the article:

GW190521: A Binary Black Hole Merger with a Total Mass of $150M_{\odot }$
R. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration)
Phys. Rev. Lett. 125, 101102 (2020)

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