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PreprintCC BY-NC-ND 4.0arXiv

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

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Abstract

ESO's VLTI has a history of record-breaking discoveries in astrophysics using high-angular resolution instrumentation. Its latest visitor instrument, the Asgard instrumental suite, is one key to further enhance the potential of the facility, particularly in the very near-infrared. It comprises four natively collaborating instruments: HEIMDALLR, a K-band fringe tracker, wavefront corrector and stellar interferometer in K band, with the same optics; Baldr, an H-band Zernike wavefront sensor; BIFROST, an Y-J-H-band photonic combiner whose main science case is studying the formation processes and properties of stellar and planetary systems; and NOTT, an L-band nulling interferometer for imaging young planetary systems. Each of these instruments promise significant advances in their respective science goals that scale with their technical challenges and technology innovations. The integration of Asgard is planned in three phases. The first one (integration, commissioning of HEIMDALLR and Baldr) is successfully done. In this paper, we show an overview of the current progress of the integration of Asgard, the first results of the on-sky commissioning of HEIMDALLR and the future steps and observing policies for Asgard to serve the broader community.

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BibTeX
@misc{martinod2026pushing,
  title = {{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}},
  author = {Marc-Antoine Martinod and Michael J. Ireland and Denis Defrère and Stefan Kraus and Frantz Martinache and Peter G. Tuthill and Emilie Bouzerand and Julia Bryant and Sorabh Chhabra and Peter Chingaipe and Benjamin Courtney-Barrer and Fred Crous and Nick Cvetojevic and Daniel S. Dahl and Colin Dandumont and Steve Ertel and Germain Garreau and Adrian M. Glauser and Xavier Haubois and Lucas Labadie and Stéphane Lagarde and Daniel Lancaster and Romain Laugier and Roxanne Ligi and Nathan Long and Alexandra Mazzoli and Thomas Mattheussen and György Medgyesi and Kwinten Missiaen and Sébastien Morel and Daniel J. Ahrer and Barnaby Norris and Jyotirmay Paul and Romain Petrov and Gert Raskin and Sylvie Robbe-Dubois and Gordon Robertson and Muhammad Salman and Ahmed Sanny and Nicolas Schuhler and Owain Snaith and Adam K. Taras},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.24567},
  eprint = {2609.24567},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.24567},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - UNPB
TI  - 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
AU  - Marc-Antoine Martinod
AU  - Michael J. Ireland
AU  - Denis Defrère
AU  - Stefan Kraus
AU  - Frantz Martinache
AU  - Peter G. Tuthill
AU  - Emilie Bouzerand
AU  - Julia Bryant
AU  - Sorabh Chhabra
AU  - Peter Chingaipe
AU  - Benjamin Courtney-Barrer
AU  - Fred Crous
AU  - Nick Cvetojevic
AU  - Daniel S. Dahl
AU  - Colin Dandumont
AU  - Steve Ertel
AU  - Germain Garreau
AU  - Adrian M. Glauser
AU  - Xavier Haubois
AU  - Lucas Labadie
AU  - Stéphane Lagarde
AU  - Daniel Lancaster
AU  - Romain Laugier
AU  - Roxanne Ligi
AU  - Nathan Long
AU  - Alexandra Mazzoli
AU  - Thomas Mattheussen
AU  - György Medgyesi
AU  - Kwinten Missiaen
AU  - Sébastien Morel
AU  - Daniel J. Ahrer
AU  - Barnaby Norris
AU  - Jyotirmay Paul
AU  - Romain Petrov
AU  - Gert Raskin
AU  - Sylvie Robbe-Dubois
AU  - Gordon Robertson
AU  - Muhammad Salman
AU  - Ahmed Sanny
AU  - Nicolas Schuhler
AU  - Owain Snaith
AU  - Adam K. Taras
PY  - 2026
DA  - 2026/09/25
PB  - arXiv
DO  - 10.48550/arxiv.2609.24567
UR  - https://arxiv.org/abs/2609.24567
AB  - ESO's VLTI has a history of record-breaking discoveries in astrophysics using high-angular resolution instrumentation. Its latest visitor instrument, the Asgard instrumental suite, is one key to further enhance the potential of the facility, particularly in the very near-infrared. It comprises four natively collaborating instruments: HEIMDALLR, a K-band fringe tracker, wavefront corrector and stellar interferometer in K band, with the same optics; Baldr, an H-band Zernike wavefront sensor; BIFROST, an Y-J-H-band photonic combiner whose main science case is studying the formation processes and properties of stellar and planetary systems; and NOTT, an L-band nulling interferometer for imaging young planetary systems. Each of these instruments promise significant advances in their respective science goals that scale with their technical challenges and technology innovations. The integration of Asgard is planned in three phases. The first one (integration, commissioning of HEIMDALLR and Baldr) is successfully done. In this paper, we show an overview of the current progress of the integration of Asgard, the first results of the on-sky commissioning of HEIMDALLR and the future steps and observing policies for Asgard to serve the broader community.
ER  -