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Fig. 2.

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NH plotted against Eddington ratio. Sources marked in red are the selected candidates. Solid grey contours are eFEDS sample after applying the cut on redshift (z > 0.5) and dashed grey contours show the full eFEDS sample. ID 608 (Brusa et al. 2022; blue star) and the sources isolated from Sect. 2.2 are shown with violet circles. The black thick dashed line and curve represent the region NH > 1021.5 cm−2 and λEdd > effective Eddington limit. The dotted curve (thick and thin) is the effective Eddington limit for different values of NH (Fabian et al. 2009).

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