%0 Journal Article %T SDSS-IV/SPIDERS: A catalogue of X-ray selected AGN properties - Spectral properties and black hole mass estimates for SPIDERS SDSS DR14 type 1 AGN %A A. Del Moro %A A. Merloni %A A. Schulze %A D. Coffey %A D. P. Schneider %A J. Comparat %A K. Nandra %A M. Salvato %A T. Dwelly %A Th. Boller %J - %D 2019 %R 10.1051/0004-6361/201833996 %X This work presents the catalogue of optical spectral properties for all X-ray selected SPIDERS active galactic nuclei (AGN) up to SDSS DR14. SPIDERS (SPectroscopic IDentification of eROSITA Sources) is an SDSS-IV programme that is currently conducting optical spectroscopy of the counterparts to the X-ray selected sources detected in the ROSAT all-sky survey and the XMM-Newton slew survey in the footprint of the Extended Baryon Oscillation Spectroscopic Survey (eBOSS). The SPIDERS DR14 sample is the largest sample of X-ray selected AGN with optical spectroscopic follow-up to date. The catalogue presented here is based on a clean sample of 7344 2RXS ( ) and 1157 XMM-Newton slew survey ( ) type 1 AGN with spectroscopic coverage of the H¦Â and/or MgII emission lines. Visual inspection results for each object in this sample are available from a combination of literature sources and the SPIDERS group, which provide both reliable redshifts and source classifications. The spectral regions around the H¦Â and MgII emission lines have been fit in order to measure both line and continuum properties, estimate bolometric luminosities, and provide black hole mass estimates using the single-epoch (or photoionisation) method. The use of both H¦Â and MgII allows black hole masses to be estimated up to z£¿£¿£¿2.5. A comparison is made between the spectral properties and black hole mass estimates derived from H¦Â and MgII using the subsample of objects which have coverage of both lines in their spectrum. These results have been made publicly available as an SDSS-IV DR14 value added catalogue %U https://www.aanda.org/articles/aa/full_html/2019/05/aa33996-18/aa33996-18.html