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Fig. 13


RGS1 second order data of PKS 2155-304, divided by the continuum, are shown with blue crosses in different wavebands (different panels). The black box is placed at 0.5 times the wavelengths of the CCD gaps in the RGS1 first order (left panel). The vertical lines are placed at 0.5 times the wavelengths of O iv and O v (right panel).

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