OzDES reverberation mapping of Active Galactic Nuclei: Final data release, black-hole mass results, and scaling relations

Abstract Over the last decade, the Australian Dark Energy (OzDES) collaboration has used Reverberation Mapping to measure the masses of high redshift supermassive black holes. Here we present the final review and analysis of this OzDES reverberation mapping campaign. These observations use 6 minus 7 6 − 7 $6-7$ years of photometric and spectroscopic observations of 735 Active Galactic Nuclei (AGN) in the redshift range z element of left bracket 0.13 comma 3.85 right bracket z ∈ [ 0.13 , 3.85 ] $z\in [0.13, 3.85]$ and bolometric luminosity range log Subscript 10 Baseline left parenthesis upper L Subscript normal b normal o normal l Baseline right parenthesis element of left bracket 44.3 comma 47.5 right bracket normal e normal r normal g divided by normal s log 10 ⁡ ( L b o l ) ∈ [ 44.3 , 47.5 ] e r g / s $\log_{10}(L_{\mathrm{bol}})\in [44.3, 47.5] \; \mathrm{erg/s}$ . Both photometry and spectra are observed in visible wavelengths, allowing for the physical scale of the AGN broad line region to be estimated from reverberations of the H beta β $\beta$ , Mg II and C IV emission lines. We successfully use reverberation mapping to constrain the masses of 62 super-massive black holes, and combine with existing data to fit a power law to the lag-luminosity relation for the H beta β $\beta$ and Mg II lines with a scatter of tilde 0.25 ∼ 0.25 $\sim0.25$ dex, the tightest yet identified, fit specifically for consistency with high redshift AGN. We fit a similarly constrained relation for C IV , resolving a tension with the low luminosity literature AGN by accounting for selection effects arising from finite survey length