Baring, M.G.; Wadiasingh, Z.; Gonthier, P.L.; Harding, A.K. (IOP Publishing, 2017)
Non-thermal quiescent X-ray emission extending between 10 keV and around 150
keV has been seen in about 10 magnetars by RXTE, INTEGRAL, Suzaku, NuSTAR and Fermi-
GBM. For inner magnetospheric models of such hard X-ray ...