Low-Redshift Interlopers in the SDSS DR16 $z>5$ Quasar Catalogue

Vivek Kumar Jha, Harikumar N, Yogesh Wadadekar

High-redshift quasars ($z>5$) are crucial for studying early black hole growth and reionisation. SDSS Data Release 16 catalogues 655 such sources with multiple redshift estimators.…