It's a fitting coincidence. Just a few months after celebrating the 100th anniversary of Einstein's theory of General Relativity (GR), we have just heard that gravitational waves, a key prediction of GR, have been directly detected for the first time. The February 11th, 2016 announcement by the Laser Interferometry Gravitational-Wave Observatory (LIGO) team is one of the most important moments in the history of astrophysics. Here, I discuss how observations with NASA’s Chandra X-ray Observatory and other traditional observatories help complement the detection and study of gravitational waves.
Figure 1: The LIGO Hanford Observatory. Credit: Caltech/MIT/LIGO Observatory
Gravitational waves are produced by violent events, such as the collisions and mergers of neutron star or black hole pairs, or the collapse and explosion of massive stars in supernovas. As a September 2015 news release by LIGO eloquently explains,