The Exoplanet Transmission Spectroscopy Imager (ETSI)

Mary Anne Limbach; Luke M. Schmidt; D. L. DePoy; Jeffrey C. Mason; Mike Scobey; Pat Brown; Chelsea Taylor; Jennifer L. Marshall

doi:10.1117/12.2562371

13 December 2020 The Exoplanet Transmission Spectroscopy Imager (ETSI)

Mary Anne Limbach, Luke M. Schmidt, D. L. DePoy, Jeffrey C. Mason, Mike Scobey, Pat Brown, Chelsea Taylor, Jennifer L. Marshall

Author Affiliations +

Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 114477D (2020) https://doi.org/10.1117/12.2562371
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

We present the design of a novel instrument tuned to detect transiting exoplanet atmospheres. The instrument, which we call the exoplanet transmission spectroscopy imager (ETSI), makes use of a new technique called common-path multi-band imaging (CMI). ETSI uses a prism and multi-band filter to simultaneously image 15 spectral bandpasses on two detectors from 430 975nm (with an average spectral resolution of R = λ/∆λ = 23) during exoplanet transits of a bright star. A prototype of the instrument achieved photon-noise limited results which were below the atmospheric amplitude scintillation noise limit. ETSI can detect the presence and composition of an exoplanet atmosphere in a relatively short time on a modest-size telescope. We show the optical design of the instrument. Further, we discuss design trades of the prism and multi-band filter which are driven by the science of the ETSI instrument. We describe the upcoming survey with ETSI that will measure dozens of exoplanet atmosphere spectra in ~2 years on a two meter telescope. Finally, we will discuss how ETSI will be a powerful means for follow up on all gas giant exoplanets that transit bright stars, including a multitude of recently identified TESS (NASA’s Transiting Exoplanet Survey Satellite) exoplanets.

Citation Download Citation

Mary Anne Limbach, Luke M. Schmidt, D. L. DePoy, Jeffrey C. Mason, Mike Scobey, Pat Brown, Chelsea Taylor, and Jennifer L. Marshall "The Exoplanet Transmission Spectroscopy Imager (ETSI)", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 114477D (13 December 2020); https://doi.org/10.1117/12.2562371

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available