  Using 2.5 Ms of data obtained by the INTEGRAL satellite in 2003-2004, we
discovered persistent hard X-ray emission from the soft gamma-ray repeater SGR
1900+14. Its 20-100 keV spectrum is well described by a steep power law with
photon index Gamma=3.1+/-0.5 and flux 1.5E-11 erg/cmsq/s. Contrary to SGR
1806-20, the only other soft gamma-ray repeater for which persistent emission
above 20 keV was reported, SGR 1900+14 has been detected in the hard X-ray
range while it was in a quiescent state (the last bursts from this source were
observed in 2002). By comparing the broad band spectra (1-100 keV) of all the
magnetars detected by INTEGRAL (the two SGRs and three anomalous X-ray pulsars)
we find evidence for a different spectral behaviour of these two classes of
sources.
