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• W4206103516 abstract "We search for ultra-luminous Quasi-Stellar Objects (QSOs) at high redshift using photometry from the SkyMapper Southern Survey Data Release 3 (DR3), in combination with 2MASS, VHS DR6, VIKING DR5, AllWISE, and CatWISE2020, as well as parallaxes and proper motions from Gaia DR2 and eDR3. We report 142 newly discovered Southern QSOs at $3.8<z<5.5$, of which 126 have $M_{145} <-27$ ABmag and are found in a search area of 14,486 deg$^2$. This Southern sample, utilising the Gaia astrometry to offset wider photometric colour criteria, achieves unprecedented completeness for an ultra-luminous QSO search at high redshift. In combination with already known QSOs, we construct a sample that is $>80$ per cent complete for $M_{145}<-27.33$ ABmag at $z=4.7$ and for $M_{145}<-27.73$ ABmag at $z=5.4$. We derive the bright end of the QSO luminosity function at restframe 145 nm for $z=4.7-5.4$ and measure its slope to be $beta = -3.60pm0.37$ and $beta = -3.38pm0.32$ for two different estimates of the faint-end QSO density adopted from the literature. We also present the first $zsim 5$ QSO luminosity function at restframe 300 nm." @default.
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• W4206103516 date "2022-01-10" @default.
• W4206103516 modified "2023-10-14" @default.
• W4206103516 title "Ultraluminous high-redshift quasars from SkyMapper – II. New quasars and the bright end of the luminosity function" @default.
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• W4206103516 doi "https://doi.org/10.1093/mnras/stac051" @default.
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