Adaptive Optics correction retrieves PSF temporally and spatially variating following the optical turbulence dynamics. The stability of the energy ratio core/wings affect the photometric precision, and the spatial variation of the shape of the PSF core makes complicated the morphology analysis of quasi point-like sources. Time averaging mitigates the temporal variation effect while spatial...
MICADO@EELT will be the workhorse facility for Adaptive Optic assisted
ground-breaking NIR deep high spatial-resolution imaging and
spectroscopy of the next decade. Modern ground-based large telescopes
depend heavily on AO systems to correct for atmospheric
turbulence. The recovery of the intrinsic properties of the observed
sources (position, photometry, morphology) depends critically on...
In the AO era, the intrinsic complexity and variability of the point spread function (PSF) poses severe challenges to the analysis of optical and NIR images.
I will present preliminary results from a new astro-photometric software which we specifically designed to deal with spatially complex and variable PSFs.
The software iteratively build a series of numerical PSFs from different regions...
Precise stellar photometry and astrometry require the best possible modelling of the point spread function (PSF). To date, the best performances have been obtained when building the PSF directly from the image of dense stellar fields, exploiting the fact that each star represents a different realisation of the same PSF. The recent advent of the Adaptive Optics technique makes this method more...
Diffraction-limited frames sequences, containing millions of pupil-stabilized images acquired at kHz rate after Extreme Adaptive Optics (ExAO) correction, will be the baseline outcome of SHARK-VIS, the forthcoming high-contrast imager in the visible band for the Large Binocular Telescope (LBT).
Such fast-cadence imaging concept allows us to freeze the evolution of the ExAO residual speckles,...
Modern astronomy is strongly supported by the considerable development of the technology: the effort towards probing new AO methods, building new instrumentation and systems is tightly correlated to the progress in science. The next generation of telescopes have to demonstrate to be up to the task, meeting the expectations of the astronomical community. This can be partially ensured conducing...
The Starfinder code (Diolaiati et Al 2000) has been the first attempt to face with the typical adaptive optics structured Point Spread Function (PSF) in dense star fields to accomplish astrometric and photometric analysis. The next release of the software will also handle a variation of the PSF across the Field of View (FoV) including the option of an analytical variation model that can be...
The activities related to the INAF IT had a heavy acceleration in the last year, also related to the infrastructure of the Bologna Tecnopole, the assignment of the CINECA-led Euro HPC project, the SKA and CTA projects. This acceleration has made that the experience gained with national calculation, storage and archives projects (eg MoU CINECA, CHIPP project, connection with the Commercial...
