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Table 1

Classification definitions of NELG objects.

Sub-sample Optical1 X-ray1 N T ≥ 10 X/O ≥ 0.1 FWHMHβ > 600 km s-1
% % %

BPT-SF true-SF SF SF/AGN 38 0.10 0.00 0.03
missing-AGN SF AGN 28 0.93 0.96 0.89
BPT-AGN weak-AGN AGN SF/AGN 62 0.03 0.08 0.05
strong-AGN AGN AGN 83 0.30 0.79 0.19

Notes. Column 1: sub-sample name; Col. 2: classification of the source using the Kauf03’s line as a separation criterion between SF and AGN activity; Col. 3: X-ray based classification according to hard X-ray luminosity, LX; Col. 4: total number of sources in the subsample; Col. 4(5): the fraction of sources in the subsample that display a thickness parameter (X-ray-to-optical flux ratio) higher than 1 (0.1) as expected for a typical AGN; Col. 5: the fraction of sources that exhibit an HβFWHM larger than 600 km s-1.

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