Two new outbursts detected from the magnetar 1E 1048.1−5937

Using NASA’s Neil Gehrels Swift Observatory, astronomers have identified two new outbursts from the magnetar 1E 1048.1−5937. The newly detected events could shed more light on the nature of this source. The finding is detailed in a paper published January 17 on arXiv.org.

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Tau.Neutrino said:

Two new outbursts detected from the magnetar 1E 1048.1−5937

Using NASA’s Neil Gehrels Swift Observatory, astronomers have identified two new outbursts from the magnetar 1E 1048.1−5937. The newly detected events could shed more light on the nature of this source. The finding is detailed in a paper published January 17 on arXiv.org.

more….

Magnetars are weird.

> Discovered in 1986 as a persistent X-ray source, 1E 1048.1−5937 is a magnetar with a pulse period of 6.4 seconds. It is one of the most active known magnetars that has exhibited at least four long-term flux flares, as well as several magnetar-like bursts, and pulse profile changes. What is puzzling is that 1E 1048.1−5937 showcases a dramatically changing spin-down rate, which seems to occur regularly following its radiative outbursts.

> It was found that the new outbursts were followed by periods of delayed torque fluctuations. During these phases, the spin-down rate reached about 1.73 time the value measured during the quiescent state.

https://arxiv.org/pdf/2001.06450.pdf

Have a look at this. In the top panel is energy with three main outbursts. The third panel is radius, the magnetar radius varies from 2.5 km to 4 km. I could walk that, not too close to the magnetar, though. The fourth panel is spin, and fifth is spin down rate, uneven or what. Pulsars tend to have constant spindown except during glitches when the radius shrinks and spin increases. This magnetar is very different.

Energy bursts and spin-down rate over a longer period of time. The spin down rate chands a year after the energy burst. Try firring a mathematical model to this – no way.