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In this work, we present the first detailed analysis of the supernova remnantRX J1713.7-3946 in the hard X-ray energy range with the IBIS coded-masktelescope on board the INTEGRAL observatory. The shell-type morphology of theentire remnant is mapped in hard X-rays for the first time and significantlydetected up to 50 keV. The IBIS sky image of RX J1713.7-3946, accumulated over14 years of operations, demonstrates two extended hard X-ray sources. Thesesources are spatially consistent with northwest and southwest rims of RXJ1713.7-3946 and are also clearly visible at energies below 10 keV withXMM-Newton. This points to a single emission mechanism operating in soft andhard X-rays. The INTEGRAL 17-120 keV spectrum of RX J1713.7-3946 ischaracterized by a power-law continuum with the photon index of$\Gamma\approx3$, that is significantly softer than $\Gamma\approx2$ determinedby XMM-Newton in the 1-10 keV energy range, suggesting a progressive steepeningof the spectrum with the energy.

Progressive steepening of the SNR RX J1713.7-3946 X-ray spectrum from XMM-Newton to INTEGRAL