How do astronomers typically locate and study the aftermath of a supernova explosion?

Answer

By observing the intense X-ray glow caused by the shock heating surrounding gas.

The shockwave violently compresses and heats the surrounding gas to millions of degrees, causing it to glow intensely, particularly in X-rays, which allows astronomers to locate and study the remnant.

How do astronomers typically locate and study the aftermath of a supernova explosion?
Elementsupernovashockwave