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High-angular resolution and high contrast observations from Y to L band at the Very Large Telescope Interferometer with the Asgard Instrumental suite
Kraus, Stefan; Gardner, Tyler; Ertel, Steve +25 more
European Southern Observatory (ESO)'s Very Large Telescope Interferometer (VLTI), Paranal, Chile, is one of the most proficient observatories in the world for high angular resolution astronomy. It has hosted several interferometric instruments operating in various bandwidths in the infrared. As a result, the VLTI has yielded countless discoveries …
Vortex fiber nulling for exoplanet observations: implementation and first light
Fitzgerald, Michael P.; Ren, Bin B.; Jovanovic, Nemanja +31 more
Vortex fiber nulling (VFN) is a single-aperture interferometric technique for detecting and characterizing exoplanets separated from their host star by less than a diffracted beam width. VFN uses a vortex mask and single-mode fiber to selectively reject starlight while coupling off-axis planet light with a simple optical design that can be readily…
AIROPA IV: Validating point spread function reconstruction on various science cases
Lu, Jessica R.; Fitzgerald, Michael P.; Do, Tuan +7 more
We present an analysis of six independent on-sky datasets taken with the Keck-II/NIRC2 instrument. Using the off-axis point spread function (PSF) reconstruction software AIROPA, we extract stellar astrometry, photometry, and other fitting metrics to characterize the performance of this package. We test the effectiveness of AIROPA to reconstruct th…
Spectrally dispersed kernel phase interferometry with SCExAO/CHARIS: proof of concept and calibration strategies
Martinache, Frantz; Chaushev, Alexander; Sallum, Steph +7 more
Kernel phase interferometry (KPI) is a data processing technique that allows for the detection of asymmetries (such as companions or disks) in high-Strehl images, close to and within the classical diffraction limit. We show that KPI can successfully be applied to hyperspectral image cubes generated from integral field spectrographs (IFSs). We demo…