The upgrade of the VLTI infrastructure for the 2nd generation instruments is now complete with the transformation of the laboratory, and installation of star separators on both the 1.8-m Auxiliary Telescopes (ATs) and the 8-m Unit Telescopes (UTs). The Gravity fringe tracker has had a full semester of commissioning on the ATs, and a first look at the UTs. The CIAO infrared wavefront sensor is about to demonstrate its performance relative to the visible wavefront sensor MACAO. First astrometric measurements on the ATs and astrometric qualification of the UTs are on-going. Now is a good time to revisit the performance roadmap for VLTI that was initiated in 2014, which aimed at coherently driving the developments of the interferometer, and especially its performance, in support to the new generation of instruments: Gravity and MATISSE.
@article{arxiv.1608.06752,
title = {The 2nd Generation VLTI path to performance},
author = {Julien Woillez and Jaime Alonso and Jean-Philippe Berger and Henri Bonnet and Willem-Jan de Wit and Sebastian Egner and Frank Eisenhauer and Frédéric Gonté and Sylvain Guieu and Pierre Haguenauer and Antoine Mérand and Lorenzo Pettazzi and Sébastien Poupar and Markus Schöller and Nicolas Schuhler},
journal= {arXiv preprint arXiv:1608.06752},
year = {2016}
}