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Fig. 6


Transmission spectrum of GJ 1214b from our data. Overplotted are models for the atmosphere of GJ 1214b. The green (dashed-dotted) line is a hydrogen rich atmosphere with a solar metallicity, the red (dashed) curve is for an atmosphere that is hydrogen rich with a sub-solar metallicity and a cloud layer at 0.5 bar, the blue (dashed-triple dotted) line is for an atmosphere that is dominated by water. The dotted curves at the bottom of the plot show the various transmission curves of the filters used for our measurements.

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