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GEMS JWST: Hold on to Your HATS(-6 b), a Subsolar-metallicity Giant Planet with Water, Methane, and Ammonia in its Atmosphere

  • Authors: Giannina Guzmán Caloca, Caleb I. Cañas, Nicole L. Wallack, Erin M. May, Shang-Min Tsai, Simon Müller, Ravit Helled, Shubham Kanodia, Jacob Lustig-Yaeger, Knicole D. Colón, Ian Czekala, Megan Delamer, Peter Gao, Te Han, Jessica Libby-Roberts, Suvrath Mahadevan, Anjali A. A. Piette, Guđmundur Stefánsson, Kevin B. Stevenson

Giannina Guzmán Caloca et al 2026 The Astronomical Journal 172 .

  • Provider: AAS Journals

Caption: Figure 2.

The finalized, full-resolution transmission spectra shown by visit in the first two panels using Eureka1 and ExoticJEDI reductions. The lower panel shows the coadded transmission spectrum for each of the three reductions: Eureka1, Eureka2, and ExoticJEDI. We find a generally good agreement between all three reductions, on average within 2σ of each other, despite a significant difference in limb-darkening and systematic treatment in the Eureka2 reduction, which could explain its slightly higher slope on the bluer end of the spectrum. The binned spectra have 120 spectral channels with 40 nm bins. A comparison of the visits for each reduction is shown in Figure E1.

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