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Fig. 4


Light curves of Fe K line (a: upper panel) and the 2–8 keV continuum (b: bottom panel) of IRAS F00183–7111, observed with four X-ray observatories over 2003–2016. The continuum flux is in units of 10-14 erg s-1 cm-2. Note that the joint fit determines the continuum shape better than in an individual fit, helping reducing the uncertainties of the line fluxes. The line flux appears to decrease continuously by factor of ~ 4 since the first observation with XMM-Newton while the continuum flux remains at comparable level within 30%.

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