Fig. 1
Left: mean Chandra LETG spectrum of September 2000 reduced to the first diffraction order (green curve) and fitted with the EXP+CF model (upper black solid curve, see text). Right, top: residuals for the 1BB+CF model represented by the data/model flux ratio. The reduced χ2 value refers to the energy range of 0.10–0.50 keV. Center: same for the 2BB+CF model. The twelve spectral bins excluded in the fits are indicated by tick marks. Bottom: same for the EXP+CF model displayed in the left panel.
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