[7] The black hole was studied in combination by NASA's Chandra X-ray Observatory and the Gemini telescope on Mauna Kea, Hawaii.

This process typically results in a large amount of mass being lost from the system, so much that the parent star should not have been able to form a 15.7 M☉ black hole.

[8][9][10] In such an orbit, the future black hole is able to start transferring mass while it is still fusing hydrogen into helium.

As a result, it loses most of its hydrogen becoming a Wolf–Rayet star and shedding the rest of the envelope in the form of stellar wind, exposing its core.

Finally, the star collapses creating the black hole, and begins absorbing material from its companion, leading to X-ray emissions.