Magnetars are the most intensely magnetised objects in the Universe. They exhibit magnetic field strengths which are 1015 times stronger than that of the Earth. On 2008 August 22 a new magnetar, labelled SGR 0501+4516, underwent an outburst, which was promptly observed by INTEGRAL a few days after its activation. This led to the first discovery of transient hard X-ray emission in a magnetar, which faded out within about 10 days from the onset of the eruption. The left panel shows the IBIS-ISGRI image of SGR 0501+4516 taken 5 days after the outburst activation, while in the right panel the IBIS-ISGRI non-detection about 10 days later is shown. On both images the BAT error circle is superimposed on the SGR 0501+4516 position.
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The POM Archive
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