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Table 4.

Luminosities of ULX and diffuse emission in ESO 338-4.

ESO 338-4 log(LXobs) log(LXcor) log ( L 0.054 12 keV model Mathematical equation: $ \log(L^{\mathrm{model}}_{0.054{-}12\,\mathrm{keV}} $)
(erg s−1) (erg s−1) (erg s−1)
ULX1 40.47 41.14 41.5
ULX2 40.45 40.49 40.5
ULX3 39.63 40.04
ULX4 39.37 39.78
ULX5 39.46 40.01
Galaxy diffuse 40.15 40.26 40.7
Galaxy total 40.91 41.33 41.6
Halo 40.13 40.17

Notes. We report the observed luminosities LXobs, uncorrected for absorption, and the absorption-corrected values LXcor. The 0.5 − 8 keV X-ray luminosities (LX) were calculated from the best-fit spectral models applied to the data (Table 2). The luminosities in the 0.054 − 12 keV range were derived by extrapolating the absorption-corrected models. The galaxy L 0.054 12 keV model Mathematical equation: $ L^{\mathrm{model}}_{0.054{-}12\,\mathrm{keV}} $ was corrected for the intrinsic absorption for ULX1 and 2, but not for ULX3, 4, and 5, as extending a power law to UV energies would yield unrealistically high luminosities.

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