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ExTrA: Exoplanets in Transit and their Atmospheres

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arxiv 1508.06601 v1 pith:7WE7RQ36 submitted 2015-08-26 astro-ph.IM astro-ph.EP

ExTrA: Exoplanets in Transit and their Atmospheres

X. Bonfils , J.M. Almenara , L. Jocou , A. Wunsche , P. Kern , A. Delboulb\'e , X. Delfosse , P. Feautrier
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T. Forveille L. Gluck S. Lafrasse Y. Magnard D. Maurel T. Moulin F. Murgas P. Rabou S. Rochat A. Roux E. Stadler
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The ExTrA facility, located at La Silla observatory, will consist of a near-infrared multi-object spectrograph fed by three 60-cm telescopes. ExTrA will add the spectroscopic resolution to the traditional differential photometry method. This shall enable the fine correction of color-dependent systematics that would otherwise hinder ground-based observations. With both this novel method and an infrared-enabled efficiency, ExTrA aims to find transiting telluric planets orbiting in the habitable zone of bright nearby M dwarfs. It shall have the versatility to do so by running its own independent survey and also by concurrently following-up on the space candidates unveiled by K2 and TESS. The exoplanets detected by ExTrA will be amenable to atmospheric characterisation with VLTs, JWST, and ELTs and could give our first peek into an exo-life laboratory.

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  1. ASTEP confirmation of a pair of long-period Jupiter-sized planets with extremely low densities transiting TOI-791

    astro-ph.EP 2026-06 unverdicted novelty 5.0

    Two extremely low-density Jupiter-sized planets on long-period orbits around TOI-791 were confirmed via ground-based photometry and TTV-derived masses.