Fig. 1
XMM-Newton MOS1 (black) and PN (red) spectrum of 1ES 0229+200 from August 21, 2009. The spectra can be well fit with a power-law model taking into account an absorption larger than the Galactic absorption. In panel a), we plot the residuals for a power law considering the Galactic absorption as fixed parameter, and in panel b) residuals for a power law with a free absorption.
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