Definitely magnetare.
On December 24, 2004, many satellites went haywire at once.
Somewhere from our Milky Way galaxy, hard X-rays and gamma rays reached our solar system with such force that they instantly ionized the atmosphere and caused significant changes.
For 0.1 seconds, the energy that arrived was comparable to the energy the sun develops in 240,000 years or all the stars in the Milky Way combined, and 10,000 times brighter than the brightest supernova.4×1026 W × 3.2×1012 s = 1.3×1039 J)
It was discovered that this eruption originated from a magnetar (called SGR 1806-20) located 50,000 light-years away from us!
To illustrate the distance:
Magnetars are suspected of being responsible for past mass extinctions in Earth's history.
A magnetar is a special type of neutron star, approximately 20 km in diameter and 1.5 times the mass of the Sun, with incredibly strong magnetic fields. (~10¹ to 10¹² Tesla)
At the poles of the magnetar, enormous X-ray and gamma-ray bursts are formed by crustal earthquakes.
According to the latest findings, magnetars are almost perfect spheres. Their highest points are only a few millimeters high.
There is much we don't know about magnetars. For example, their structure.
When 1.5 solar masses are compressed into a sphere of 20km, forces arise that atoms cannot withstand, and matter becomes a soup consisting of neutrons and quarks.
Magnetar construction
For those who want to know more about this event, I recommend this video by Prof. Harald Lesch.