ESO DOI Service

• Ireland, Michael [Australian National University, Canberra, Australia]
• Martinache, Frantz [Côte d’Azur Observatory, Nice, France]
• Kraus, Stefan [University of Exeter, United Kingdom]
• Defrère, Denis [KU Leuven, Belgium]
• Taras, Adam [The University of Sydney, Australia]
• Courtney-Barrer, Benjamin [Australian National University, Canberra, Australia]
• Haubois, Xavier [European Southern Observatory (ESO)]
• Schuhler, Nicolas [European Southern Observatory (ESO)]
• Allouche, Fatme [European Southern Observatory (ESO)]
• Bernard, Julien [Australian National University, Canberra, Australia]
• Bourget, Pierre [European Southern Observatory (ESO)]
• Cvetojevic, Nick [Côte d’Azur Observatory, Nice, France]
• Garreau, Germain [KU Leuven, Belgium]
• Gil, Juan Pablo [European Southern Observatory (ESO)]
• Langford, Connor [The University of Sydney, Australia]
• Laugier, Romain [KU Leuven, Belgium]
• Ligi, Roxanne [Côte d’Azur Observatory, Nice, France]
• McGuinness, Grace [Australian National University, Canberra, Australia]
• Martinod, Marc-Antoine [Côte d’Azur Observatory, Nice, France]
• Morel, Sébastien [European Southern Observatory (ESO)]
• Pallanca, Laurent [European Southern Observatory (ESO)]
• Paul, Jyotirmay [University of Exeter, United Kingdom]
• Pavez, Marcus [European Southern Observatory (ESO)]
• Petrov, Romain G. [Côte d’Azur Observatory, Nice, France]
• Robbe-Dubois, Sylvie [Côte d’Azur Observatory, Nice, France]
• Robertson, Gordon [The University of Sydney, Australia]
• Snaith, Owain [University of Exeter, United Kingdom]
• Tuthill, Peter [The University of Sydney, Australia]

Asgard is a suite of visitor instrument modules for the Very Large Telescope Interferometer designed to deliver high-contrast interferometric capability at infrared wavelengths through the phased installation of adaptive optics, fringe-tracking and spectroscopic and nulling instrumentation. Phase 1 was integrated and installed in mid-2025, followed by a commissioning campaign exploiting the Auxiliary Telescopes. First-light results demonstrate the robust acquisition and stabilisation of fringes across all six baselines in both K-band sub-filters, with Heimdallr tracking achieved down to m_K ≈ 9.5. Early on-sky tests also validate the wavefront correction functionality provided by the Baldr instrument. With Phase 2/3 instruments (BIFROST and NOTT) now entering the integration phase, Asgard is on track to provide the community with next-generation interferometric capabilities for high-angular-resolution and high-contrast science.