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We report the discovery, spectroscopic confirmation, and mass modelling ofthe gravitationally lensed quasar system PS J0630-1201. The lens was discoveredby matching a photometric quasar catalogue compiled from Pan-STARRS and WISEphotometry to the Gaia DR1 catalogue, exploiting the high spatial resolution ofthe latter (FWHM $\sim $0.1") to identify the three brightest components of thelens. Follow-up spectroscopic observations with the WHT confirm the multipleobjects are quasars at redshift $z_{q}=3.34$. Further follow-up with Keck AOhigh-resolution imaging reveals that the system is composed of two lensinggalaxies and the quasar is lensed into a $\sim$2.8" separation four-image cuspconfiguration with a fifth image clearly visible, and a 1.0" arc due to thelensed quasar host galaxy. The system is well-modelled with two singularisothermal ellipsoids, reproducing the position of the fifth image. We discussfuture prospects for measuring time delays between the images and constrainingany offset between mass and light using the faintly detected Einstein arcsassociated with the quasar host galaxy.

The Discovery of a Five-Image Lensed Quasar at z = 3.34 using PanSTARRS1 and Gaia