  We present the results of an analysis of the quiescent X-ray emission from
the Soft Gamma-Ray Repeater SGR1806-20, taken during an INTEGRAL ultra-deep
survey of the Galactic Center region in autumn 2003. The total effective
exposure time spent on the source by the IBIS telescope during these
observations exceeded 1.5 million seconds. Combining the INTEGRAL results with
results from the XMM-Newton observatory, we present the broad band (1-200 keV)
spectrum of the quiescent emission from this source. This is the first spectrum
of the persistent emission from an SGR in the broad energy range up to 200 keV.
The luminosity of SGR1806-20 in this range was 3.6E36 ergs/s for an assumed
distance of 15 kpc. We show that weak undetected bursts should not contribute
significantly to the quiescent emission. The spectrum of the source is very
hard and has a power law shape without any trace of a high energy cutoff up to
\~160 keV. No strong cyclotron line was detected in the persistent spectrum in
the previously reported 4-6 keV band. During our next observations in the
autumn 2004 source went to active phase and its avereged flux between powerful
bursts was 2-3 times higher than in 2003. During these observations two other
SGR candidates, SGR1801-23 and SGR1808-20, were in the field of view. Neither
persistent hard X-ray emission nor bursts were detected from them. The upper
limit on the persistent flux from each of them in the energy band 18-100 keV is
about 4E-11 erg/s/cm2.
