All-sky upper limit map. We show the flux upper-limit map for eRASSl (German sky) for the single-band detection run in the 0.2–2.3 keV energy band. The upper limits are computed using a confidence interval of 99.87% and a spectral model consisting of a photon index of Γ = 2.0 affected by galactic absorption of N_H = 3 × 10²⁰ cm⁻². The map is plotted in orthographic projection where the meridian gray lines correspond to RA and the parallel lines to Dec.