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Fig. 1
Hardness-intensity diagrams for a black hole, neutron star, and cataclysmic variables. Here, LPL and LD are the X-ray and EUV luminosities, respectively. Data are taken from Maitra & Bailyn (2004) and Wheatley et al. (2003). Figure reprinted from Körding et al. (2008) by permission of Science.
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