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Ground-based Reconnaissance Observations of 21 Exoplanet Atmospheres with the Exoplanet Transmission Spectroscopy Imager

  • Authors: Ryan J. Oelkers, Luke M. Schmidt, Erika Cook, Mary Anne Limbach, D. L. DePoy, J. L. Marshall, Jimmy Ardoin, Mitchell Barry, Evan Batteas, Alexandra Boone, Brant Conway, Silvana Delgado Adrande, John D. Dixon, Enrique Gonzalez-Vega, Alexandra Guajardo, Landon Holcomb, Christian Lambert, Shravan Menon, Divya Mishra, Jacob Purcell, Zachary Reed, Nathan Sala, Noah Siebersma, Nhu Ngoc Ton, Raenessa M. L. Walker, Z. Franklin Wang, Kaitlin Webber

Ryan J. Oelkers et al 2025 The Astronomical Journal 169 .

  • Provider: AAS Journals

Caption: Figure 4.

A visual comparison of the transmission spectra measured with ETSI on separate nights. The final combined spectra are shown as a black line and the spectra for each night are shown as colored lines (red, orange, and blue). The spectra are ordered from large p-values on the top left to smaller p-values on the bottom right. All exoplanets with multiple observations of their transmission spectra have large p-values (p ≥ 0.31) indicating there no exoplanets with statistically dissimilar observations even though the transmission spectra were measured days, weeks, months, and even years apart.

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