Fig. 3

O−C diagram of GJ 1214b. The red point marks our measurement. Black points are taken from Poddaný et al. (2010) using all (professional and citizen science) data from the Exoplanet Transit Database. For example the point at O−C = 0.005 comes from one of the TRESCA light curves. Our data is consistent with other measurements finding no significant long-term variations in transit timing.
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