Sasha Hinkley, University of Exeter
Aarynn L. Carter, University of California, Santa Cruz
Shrishmoy Ray, University of Exeter
Beth Biller, The University of Edinburgh
Andrew Skemer, University of California, Santa Cruz
Elodie Choquet, Laboratoire d'Astrophysique de Marseille
Maxwell A. Millar-Blanchaer, University of California, Santa Barbara
Stephanie Sallum, University of California, Irvine
Brittany Miles, University of California, Santa Cruz
Niall Whiteford, American Museum of Natural History
Polychronis Patapis, ETH Zürich
Marshall Perrin, Space Telescope Science Institute
Laurent Pueyo, Space Telescope Science Institute
Karl Stapelfeldt, Jet Propulsion Laboratory
Jason Wang, California Institute of Technology
Kimberly Ward-Duong, Space Telescope Science InstituteFollow
Julien H. Girard, Space Telescope Science Institute
Dean Hines, Space Telescope Science Institute
Jens Kammerer, Space Telescope Science Institute
Jarron Leisenring, The University of Arizona
Yifan Zhou, The University of Texas at Austin
Michael Meyer, University of Michigan, Ann Arbor
Michael C. Liu, University Hawaii Institute for Astronomy
Mickael Bonnefoy, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG)
Simon Petrus, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG)
Mariangela Bonavita, The Open University
Gael Chauvin, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG)
Christine Chen, Space Telescope Science Institute
Thayne Currie, NASA Ames Research Center
Kielan K.W. Hoch, Space Telescope Science Institute
Cecilia Lazzoni, University of Exeter
Elisabeth C. Matthews, Université de Genève

Document Type

Conference Proceeding

Publication Date


Publication Title

Proceedings of SPIE - The International Society for Optical Engineering


The direct characterization of exoplanetary systems with high contrast imaging is among the highest priorities for the broader exoplanet community. As large space missions will be necessary for detecting and characterizing exo-Earth twins, developing the techniques and technology for direct imaging of exoplanets is a driving focus for the community. For the first time, JWST will directly observe extrasolar planets at mid-infrared wavelengths beyond 5 μm, deliver detailed spectroscopy revealing much more precise chemical abundances and atmospheric conditions, and provide sensitivity to analogs of our solar system ice-giant planets at wide orbital separations, an entirely new class of exoplanet. However, in order to maximise the scientific output over the lifetime of the mission, an exquisite understanding of the instrumental performance of JWST is needed as early in the mission as possible. In this paper, we describe our 55-hour Early Release Science Program that will utilize all four JWST instruments to extend the characterisation of planetary mass companions to ∼15-20 μm as well as image a circumstellar disk in the mid-infrared with unprecedented sensitivity. Our program will also assess the performance of the observatory in the key modes expected to be commonly used for exoplanet direct imaging and spectroscopy, optimize data calibration and processing, and generate representative datasets that will enable a broad user base to effectively plan for general observing programs in future cycles.


Coronagraphic imaging, Direct imaging, Exoplanet atmospheres, Exoplanet detection methods, Space telescopes








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