Utilizing NASA’s Fermi and Swift spacecraft, astronomers have probes SGR J1935+2154, the most recurring transient magnetar recognized to date. The latest research shines a light on the burst properties of this object. The study is detailed in a paper featured on March 23 on the arXiv pre-print repository.
Magnetars are neutron stars with extremely sturdy magnetic fields, over one quadrillion times stronger than the magnetic field of Earth. The decay of magnetic fields in magnetars powers the emission of high-energy electromagnetic radiation, for example, in the form of X-rays or radio waves.
Found in 2014, SGR J1935+2154 has a spin period of 3.24 seconds, spin-down rate of 14.3 picoseconds per second, and a dipole-magnetic field with strength at a stage of roughly 220 trillion G, what confirms its magnetar nature. Since its detection, the source experienced over 100 bursts, occurring almost yearly.
A team of astronomers headed by Lin Lin of Beijing Normal University, China, reviewed SGR J1935+2154 utilizing Fermi and Swift. The observations had been focused on 127 brief bursts that took place between 2014 and 2016.
Based on the research, 97% of the noticed bursts occurred throughout four active burst episodes, which makes SGR J1935+2154 the most proliﬁc magnetar transient so far. In general, proliﬁc magnetar transients are sources emitting over ten bursts throughout an active burst episode.