Raw fluxes not corrected for the breathing effect (empty squares), as a function of time in the September 2011 observations. Time is given relative to the center of the planetary transit. Circles correspond to the corrected flux. Each point stands for a 379 s exposure spectrum, summed over the whole Lyman-α line, and normalized by the flux over the entire corresponding orbit. Vertical dashed lines show the beginning and end of ingress and egress of the transit.
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