Point spread function reconstruction for SOUL + LUCI LBT data

Abstract

Here, we present the status of an ongoing project aimed at developing a point spread function (PSF) reconstruction software for adaptive optics (AO) observations. In particular, we test for the first time the implementation of pyramid wave-front sensor data on our algorithms. As a first step in assessing its reliability, we applied the software to bright, on-axis, point-like sources using two independent sets of observations, acquired with the single-conjugated AO upgrade for the Large Binocular Telescope. Using only telemetry data, we reconstructed the PSF by carefully calibrating the instrument response. The accuracy of the results has been first evaluated using the classical metric: specifically, the reconstructed PSFs differ from the observed ones by <2% in Strehl ratio and 4.5% in full-width at half maximum. Moreover, the recovered encircled energy associated with the PSF core is accurate at 4% level in the worst case. The accuracy of the reconstructed PSFs has then been evaluated by considering an idealized scientific test-case consisting in the measurements of the morphological parameters of a compact galaxy. In the future, our project will include the analysis of anisoplanatism, low signal-to-noise ratio regimes, and the application to multi-conjugated AO observations.

Status of the PSF Reconstruction Work Package for MICADO ELT

“…2 Based on this tests, we can confirm that the MICADO PSF-R Application has reached at present a Technology Readiness Level (TRL) corresponding to TRL=7. Further details on the PSF reconstruction of LBT/SOUL+LUCI data can be found in this proceeding (Simioni et al 2022).…”

“…The scientific evaluation of the PSF-R tools is currently on-going for extragalactic cases (e.g. galaxy morphology, clumps), as detailed in this proceeding (Simioni et al 2022). We have also developed tools and a pipeline to evaluate how uncertainties on the reconstructed PSF translate into uncertainties on scientific measurements (and viceversa).…”

“…Further details on the PSF-R service for MICADO can be found in this proceeding (Arcidiacono et al 2022; Simioni et al 2022).…”

BRUTE, PSF Reconstruction for the SOUL pyramid-based Single Conjugate Adaptive Optics facility of the LBT

“…• a contact-less voice coil deformable mirror controlled in position using capacitive sensors 15 for optical turbulence correction SOUL is the optimal benchmark for the MICADO PSF-R development, see also Simioni+ (2022). 16 We develop this activity within the MAST&R working group, and gathered contributions mainly from INAF-Arcetri (SOUL data) and INAF-Padova (MICADO PSF-R team) producing a radial elongation of the PSF centered on the reference star, see Figure 1.…”