JWST NIRISS transmission spectrum of WASP-52 b at a resolving power of |$R$| = 100 (blue). The HST/WFC3 transmission spectrum retrieved by Bruno et al. (2018) with a spot-transit model is shown for comparison (yellow); note that an offset of −250 ppm has been applied. Aside from this overall offset, the shape of NIRISS and WFC3 transmission spectra show a remarkable agreement where they overlap in wavelength.