XMM-Newton results. Left: X-ray spectrum in [0.5, 8] keV range in XMM-Newton data. The data (black) is overlaid with the expected background components, including quiescent particle background (QPB, purple), soft-proton flare (SPF, yellow), and diffuse X-ray background (DXB, green). The grey band shows the size of background uncertainty. Right: upper limit in the same energy range derived from the background uncertainty.