BASS. IV. NIR lines & correlation with X-ray

With the launch of the James Webb Space Telescope, this regime is of increasing importance for dusty and obscured AGN surveys. We measure black hole masses in 68 per cent (69/102) of the sample using broad emission lines (34/102) and/or the velocity dispersion of the CaII triplet or the CO band-heads (46/102).

We find that emission-line diagnostics in the NIR are ineffective at identifying bright, nearby AGN galaxies because [FeII] 1.257um/Pa{beta} and H2 2.12um/Br{gamma} identify only 25 per cent (25/102) as AGN with significant overlap with star-forming galaxies and only 20 per cent of Seyfert 2 have detected coronal lines (6/30). We measure the coronal line emission in Seyfert 2 to be weaker than in Seyfert 1 of the same bolometric luminosity suggesting obscuration by the nuclear torus.