JWST/MIRI coronagraphic performances as measured on-sky

Understand

Characterization of directly imaged exoplanets is one of the most eagerly anticipated science functions of the James Webb Space Telescope.

• MIRI, the mid-IR instrument has the capability to provide unique spatially resolved photometric data points in a spectral range never achieved so far for such objects.
• We aim to present the very first on-sky contrast measurements of the MIRI's coronagraphs.
• In addition to a classical Lyot coronagraph at the longest wavelength, this observing mode implements the concept of the four quadrant phase mask for the very first time in a space telescope.