Observed/expected hard X-ray (2–10 keV) luminosity ratio vs. SFR/M ⋆ ratio. The expected X-ray luminosity only includes the X-ray emission from LMXBs and HMXBs and is based on the relation LX = αM ⋆ + βSFR from Lehmer et al. (2010). The dashed lines indicate the scatter in this relation. Galaxy symbols are as in Fig. 5.
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