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A Low-Magnetic-Field Soft Gamma Repeater

Tiengo, A.; Götz, D.; Mereghetti, S. +8 more

Soft gamma repeaters (SGRs) and anomalous x-ray pulsars form a rapidly increasing group of x-ray sources exhibiting sporadic emission of short bursts. They are believed to be magnetars, that is, neutron stars powered by extreme magnetic fields, B ~ 10¹⁴ to 10¹⁵ gauss. We report on a soft gamma repeater with low magnetic field…