XMM-Newton X-ray spectra of the compact source 3XMM J204920.4+290107 (left) and the extended source 3XMM J204914.4+290324 (right), corresponding to the Seyfert galaxy and galaxy cluster described in the text, respectively. The EPIC pn (black) and MOS1+2 (red) spectra (crosses) are shown along with the best-fit model (solid lines) in the upper panels and the fit residuals, in units of sigma, are shown in the lower panels.