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

Kuznetsova, Ekaterina; Krivonos, Roman; Churazov, Eugene; Lyskova, Natalia; Lutovinov, Alexander

doi:10.1093/mnras/stz2261

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

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Churazov, Eugene
High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;

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Citation

Kuznetsova, E., Krivonos, R., Churazov, E., Lyskova, N., & Lutovinov, A. (2019). Progressive steepening of the SNR RX J1713.7–3946 X-ray spectrum from XMM–Newton to INTEGRAL. Monthly Notices of the Royal Astronomical Society, 489(2), 1828-1836. doi:10.1093/mnras/stz2261.

Cite as: https://hdl.handle.net/21.11116/0000-0005-5050-6

Abstract

In this work, we present the first detailed analysis of the supernova remnant RX J1713.7–3946 in the hard X-ray energy range with the Imager on Board the INTEGRAL Satellite (IBIS) coded-mask telescope onboard the INTEGRAL observatory. The shell-type morphology of the entire remnant is mapped in hard X-rays for the first time and significantly detected up to 50 keV. The IBIS sky image of RX J1713.7–3946, accumulated over 14 yr of operations, demonstrates two extended hard X-ray sources. These sources are spatially consistent with north-west and south-west rims of RX J1713.7–3946 and are also clearly visible at energies below 10 keV with XMM–Newton. This points to a single emission mechanism operating in soft and hard X-rays. The INTEGRAL 17–120 keV spectrum of RX J1713.7–3946 is characterized by a power-law continuum with the photon index of Γ ≈ 3 that is significantly softer than Γ ≈ 2 determined by XMM–Newton in the 1–10 keV energy range, suggesting a progressive steepening of the spectrum with the energy.