Fig. 4
Median photon energy map of the knot K region obtained with EPIC pn data in the 0.3− 1.0 keV energy band in linear scale. The map was smoothed by adopting a Gaussian kernel with σ = 60″. The overlaid white contours indicate the count-rate levels at 50 and 60% of the maximum in the 0.5− 1.0 keV energy band. The bin size is 20″ and the characteristic error for the median energy is ~10 eV.
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