Hα photometric follow-up of Qatar-1. The differential light curve for Qatar-1 is indicated on the top in red circles, while the control light curve is indicated on the bottom in green squares. Horizontal lines show ± 1σ the scatter of the control light curve. The blue and pink lines show the best-fit sinusoidal to the data. The vertical dashed line shows the position at which we also acquired spectral information on Qatar-1.
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