Pushing high angular resolution and high contrast observations on the VLTI from Y to L band with the Asgard instrumental suite: integration status and plans
arxiv(2024)
Abstract
ESO's Very Large Telescope Interferometer has a history of record-breaking
discoveries in astrophysics and significant advances in instrumentation. The
next leap forward is its new visitor instrument, called Asgard. It comprises
four natively collaborating instruments: HEIMDALLR, an instrument performing
both fringe tracking and stellar interferometry simultaneously with the same
optics, operating in the K band; Baldr, a Strehl optimizer in the H band;
BIFROST, a spectroscopic combiner to study the formation processes and
properties of stellar and planetary systems in the Y-J-H bands; and NOTT, a
nulling interferometer dedicated to imaging nearby young planetary systems in
the L band. The suite is in its integration phase in Europe and should be
shipped to Paranal in 2025. In this article, we present details of the
alignment and calibration unit, the observing modes, the integration plan, the
software architecture, and the roadmap to completion of the project.
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