Abstract
We examine a possible manifestation of the electromagnetic activity of a magnetized, rotating neutron star in a binary system. Accreting matter from the companion is initially accumulated at the magnetosphere. When the accumulated mass is such that the inflow can start, together with the accretion flare there will be a burst due to the closure of electric currents. The luminosity associated to the latter effect may be as large as 1042 erg/s, if a neutron star possesses the following characteristics: massM =M⊙, period of rotationP = 5 ms, magnetic fieldB0 = 1012 G, and radiusr0 = 106 cm. The electromagnetic activity might be relevant for understanding soft gamma ray repeaters.
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