The final SDSS-IV/SPIDERS X-ray point source spectroscopic catalogue

Understand

We look to provide a detailed description of the SPectroscopic IDentification of ERosita Sources (SPIDERS) survey, an SDSS-IV programme aimed at obtaining spectroscopic classification and redshift measurements for complete samples of sufficiently bright X-ray sources.

• We describe the SPIDERS X-ray Point Source Spectroscopic Catalogue, considering its store of 11,092 observed spectra drawn from a parent sample of 14,759 ROSAT and XMM sources over an area of 5,129 deg$^2$ covered in SDSS-IV by the eBOSS survey.
• This programme represents the largest systematic spectroscopic observation of an X-ray selected sample.
• A total of 10,970 (98.9\%) of the observed objects are classified and 10,849 (97.8\%) have secure redshifts.