Cryogenic characterization of the grating vector APP coronagraph for the upcoming ERIS instrument at the VLT

Anna Boehle; Adrian M. Glauser; Matthew A. Kenworthy; Frans Snik; David Doelman; Sascha P. Quanz; Michael R. Meyer

doi:10.1117/12.2310108

6 July 2018 Cryogenic characterization of the grating vector APP coronagraph for the upcoming ERIS instrument at the VLT

Anna Boehle, Adrian M. Glauser, Matthew A. Kenworthy, Frans Snik, David Doelman, Sascha P. Quanz, Michael R. Meyer

Author Affiliations +

Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII; 107023Y (2018) https://doi.org/10.1117/12.2310108
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

We present results from a cryogenic characterization of the grating vector Apodizing Phase Plate (gvAPP) coro- nagraph that will be used in the upcoming instrument ERIS (Enhanced Resolution Imager and Spectrograph) at the VLT. ERIS consists of a 1-5 μm imager (NIX) and a 1 2.5 μm integral field spectrograph (SPIFFIER), both fed by the Adaptive Optics Facility of UT4 to yield diffraction-limited spatial resolution. A gvAPP coronagraph will be included in the NIX imager to enable high-contrast imaging observations, which will be particularly powerful for the direct imaging of exoplanets at L and M bands (~3-5 μm) and will compliment the current capabilities of VLT/SPHERE and surpass the capabilities of VLT/NACO. We utilize the near-infrared test bench of the Star and Planet Formation group at ETH Zurich to measure key properties of the gvAPP coronagraph at its operating wavelengths and under the vacuum/cryogenic (~70 K) conditions of the future ERIS instrument.

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Anna Boehle, Adrian M. Glauser, Matthew A. Kenworthy, Frans Snik, David Doelman, Sascha P. Quanz, and Michael R. Meyer "Cryogenic characterization of the grating vector APP coronagraph for the upcoming ERIS instrument at the VLT", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107023Y (6 July 2018); https://doi.org/10.1117/12.2310108

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