Fig. 1
XMM-Newton X-ray data (ObsID:040472) were used to help segregate fainter cluster members from field stars, thus facilitating the application of an isochrone and reducing uncertainties associated with the cluster distance derived (e.g., Majaess et al. 2012a; Carraro et al. 2013). Left panel: a cropped XMM-Newton image of the field encompassing M 25, while a near-infrared 2MASS J-band image is shown on the right. Red circles are 2MASS (AAA) sources that exhibit X-ray emission.
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