Through which emissions are astronomers primarily detecting magnetars?

High-energy X-rays and gamma rays

Magnetars are often difficult to detect using the traditional method associated with standard pulsars, which is the emission of steady, repeating radio beams, because their intense magnetic fields inhibit the necessary radio emission mechanism. Consequently, astronomers rely heavily on detecting their high-energy phenomena. The primary method of detection involves monitoring for sporadic, violent outbursts characterized by colossal flares of X-rays and gamma rays. This monitoring requires highly sensitive space-based telescopes capable of constantly scanning the sky for sudden, unexpected increases in high-energy photons emanating from these compact sources.