Lyman-α fluxes forsub-exposures integrated over the entire line and phase-folded on the HST orbital period (PHST = 96 min). The phase is between −0.5 and 0.5. Solid gray lines correspond to the best-fit breathing model to the data, and were scaled to the same nominal flux for the sake of comparison. Black points show sub-exposures binned manually to highlight the breathing trend. Colors correspond to HST consecutive orbits in each visit (orbits 1 – 5 are plotted in purple, blue, green, orange, and red).