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. Author manuscript; available in PMC: 2017 Feb 1.
Published in final edited form as: Astrophys J. 2016 Jan 28;817(2):162. doi: 10.3847/0004-637X/817/2/162

Figure 4.

Figure 4

Spectral sensitivity and atmospheric transmission. Labeled curves show the total spectral sensitivity of Kepler and HST observations (Koch et al. 2010; Dressel 2015). The Keck infrared bandpass includes the NIRC2 H-band filter transmission and detector quantum efficiency, but neglects the telescope optical path outside NIRC2. The atmospheric penetration depth (right axis) is the pressure level where a two-way optical depth of unity is reached in a cloud-free model of Neptune’s atmosphere, including opacity from Rayleigh scattering and gas absorption (from Sromovsky et al. 2001b).