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A comment on James Webb Space Telescope's first spectrum of a TRAPPIST-1 planet.

Re:James Webb Space Telescope's first spectrum of a TRAPPIST... by jug on Monday October 02, 2023 @11:34AM (#37739473)
Too bad the star is going to make observations within the habitable zone hard!

This problem also sounds like one that can be extrapolated into more systems as those planets are going to be close to the star by necessity…?

Frustrating that the resolving power of JWST is there even for those, but the star completely dominates the observations.

I wonder if they could perform analysis over time and apply statistical models to subtract solar output from the data, knowing the orbital periods etc. But that’s just me being a layman here.

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Re:James Webb Space Telescope's first spectrum of a TRAPPIST... by perihelions on Monday October 02, 2023 @11:40AM (#37739552)
- "I wonder if they could perform analysis over time and apply statistical models to subtract solar output from the data, knowing the orbital periods etc. But that’s just me being a layman here."

They do that in the paper. That's the "secondary eclipse", where the planet goes behind the star and they subtract the difference.

https://iopscience.iop.org/article/10.3847/2041-8213/acf7c4 [open access]

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