Top panel: Hess diagram of stars selected in reflex corrected PM space following Bonaca et al. (2019b), and with |ϕ₂|< 2 deg and RUWE < 1.4. The diagram has been smoothed using a 0.4 mag Gaussian kernel. The dashed line shows the selection from the same authors, while the solid line shows that adopted in this work. Our selection is based on a 12 Gyr, [Fe/H] = −1.7 PARSEC isochrone at a distance of 13 kpc. The red circles show confirmed stream members from Ji et al. (2020). Bottom panel: reflex corrected PM for stars selected according to the CMD mask shown above. Jhelum candidates are coloured coded by their membership probability.