Soft-Gamma Repeaters Mini-Workshop Soft-Gamma Repeaters Mini-Workshop Properties of the Soft-Gamma Repeaters: * sporadically repeat from the same source * soft spectra compared to "regular" GRBs. Magnetar: neutron star with extreme strong magnetic field 10^14-10^15 Gauss (Earth=0.6 Gauss, iron magnet 100 Gauss, pulsar 10^12) and fast rotation.