VLT/SPHERE robust astrometry of the HR8799 planets at milliarcsecond-level accuracy
VLT/SPHERE robust astrometry of the HR8799 planets at milliarcsecond-level accuracy
HR8799 is orbited by at least four giant planets, making it a prime target for the recently commissioned Spectro-Polarimetric High-contrast Exoplanet REsearch (VLT/SPHERE). As such, it was observed on five consecutive nights during the SPHERE science verification in December 2014. We aim to take full advantage of the SPHERE capabilities …