Galaxy stellar mass (log₁₀ ) versus Hubble morphological type (T) of the X-ray detected (solid blue) and non-detected (fainter blue points) eRASS:4 data. Galaxies, which are part of eRASS:4 but were also detected by previous work (Seth et al. 2008; She et al. 2017; Baldassare et al. 2022; Ohlson et al. 2023) are shown in orange colour. In addition, we show the data by Seth et al. (2008) and Baldassare et al. (2022) with grey hexagons and green triangles, respectively, for galaxies, which are not part of the eRASS:4 sample. The single X-ray detected early-type galaxies at a galaxy stellar mass of approximately 10⁹ M_⊙ is NGC 4467, whose X-ray properties were analysed by Seth et al. (2008) and Graham & Soria (2019).