Jarvis, M. J.Adams, N. J.Bowler, R. A. A.2021-02-112021-02-112020Jarvis, M. J. et al. (2020). The rest-frame UV luminosity function at z 4: A significant contribution of AGNs to the bright end of the galaxy population. Monthly Notices of the Royal Astronomical Society, 4949(2), 1771–17831365-2966https://doi.org/10.1093/mnras/staa687http://hdl.handle.net/10566/5901We measure the rest-frame ultraviolet (UV) luminosity function (LF) at z ∼ 4 self-consistently over a wide range in absolute magnitude (−27 ≲ MUV ≲ −20). The LF is measured with 46 904 sources selected using a photometric redshift approach over ∼6 deg2 of the combined Cosmological Evolution Survey and XMM–Newton Large-Scale Structure fields. We simultaneously fit for both active galactic nuclei (AGNs) and galaxy LFs using a combination of Schechter or double power law (DPL) functions alongside a single power law for the faint-end slope of the AGN LF. We find a lack of evolution in the shape of the bright end of the Lyman-break galaxy (LBG) component when compared to other studies at z ≃ 5 and evolutionary recipes for the UV LF.enGalaxies: evolutionGalaxies: formationGalaxies: high-redshiftRest-frame UV luminosityAGNArticle