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Fig. 10


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Transmission spectrum metric vs. planetary radius diagram of the small-planet population. Each point represents a confirmed exoplanets with mass and radius measured with a relative precision better than 50%. These data have been extracted from the exoplanet archive. The shape of the points indicates the technique used to measure the mass of the planet: circles for RV, and squares for transit timing variations. The color of the point reflects the equilibrium temperature of the planet. The level of transparency of the error bars indicates the relative precision of the planetary bulk density. The better the precision, the more opaque the error bars. The three transiting planets in system L 98-59 are labeled and appear circled in black. We also display the names of the other planets with the highest transmission spectrum metrics. This plot has been produced using the code available at

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