Fig. 1.
X-ray image in counts per pixel displays the field of view of Chandra ACIS-S (left panel) and XMM-Newton EPIC-MOS1 (2007-05-28; right panel) detectors. The green circles containing bright pixels show NGC 5055 X-1, while the empty green circles represent the region from where the background was extracted. Chandra spatial resolution allowed us to extract source photons from a circular region of 6″ radius, while for XMM-Newton we used circular regions of 40″.
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