Infrared to ultraviolet transmission spectrum of HD 189733 b. The top and bottom panels show the same data, focused on different spectral regions for better visibility. The colored symbols with error bars show the transit observations, 1σ uncertainties, and wavelength span of the observations (see legend). Our data points were computed from the data binned at a resolving power of R = 33 (see Appendix A). The red curve and orange shaded areas show the spectrum posterior distribution of the optical–IR fit (median, 68%, and 95% quantiles of the distribution; see Appendix B). The blue curve shows the upper atmosphere model (shaded in a slightly paler color when below the optical-IR continuum).