Jyotirmay Paul

Opening short wavelengths for VLTI: Asgard/BIFROST project status and results from AIV and commissioning (Conference Presentation)

Sorabh Chhabra, Stefan Kraus, Daniel Lancaster, Jyotirmay Paul et autres

BIFROST, part of the Asgard Suite of VLTI visitor instruments, is a short-wavelength, high-spectral resolution instrument optimized for spectral line studies in the Y, J, and H bands (1.05–1.75 μm). It will open the short-wavelength window for VLTI and cover unique atomic …

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The Asgard/BIFROST pre-injection optics and fibre injection module: revision of optomechanical design and lab and on sky results

Jyotirmay Paul, Daniel Lancaster, Sorabh Chhabra, Stefan Kraus et autres

The Asgard/BIFROST instrument at the VLTI will enable high-spectral-resolution interferometry across (1-1.75μm) (Y, J, H bands). Its pre-injection optics correct for birefringence and longitudinal dispersion, while the fibre-injection module couples beams into single-mode fibres. A fibre-switching module allows injection into different photonic …

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Dispersion control in the Asgard suite (Conference Presentation)

Jyotirmay Paul, Romain Laugier, Daniel Lancaster, Sorabh Chhabra et autres

The ASGARD suite includes BIFROST, which is designed to enhance VLTI interferometry capabilities. BIFROST opens new spectral windows in the Y, J, and H bands, enabling fringe tracking on bright on-axis stars while observing faint off-axis sources. Its pre-injection unit incorporates a …

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Integration and commissioning of the ASGARD/BIFROST low-resolution (R ≈ 50–5000) spectrograph at the VLTI

Sorabh Chhabra, Stefan Kraus, Daniel Lancaster, Jyotirmay Paul et autres

Achieving the highest angular resolution and contrast with Asgard instrumental suite for ESO’s VLTI: commissioning results and projected performance

Michael J. Ireland, Frantz Martinache, Stefan Kraus, Denis Defrère et autres

Asgard is a suite of visitor instrument modules for the ESO’s Very Large Telescope Interferometer designed to deliver high-contrast interferometric capability at infrared wavelengths through the phased installation of adaptive-optics, fringe-tracking, spectroscopic, and nulling instrumentation. The full instrumental suite will deliver by …

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Design, integration, and commissioning of the BIFROST all-in-one 4-telescope beam combiner for 1.0–1.8μm spectro-interferometry

Sorabh Chhabra, Stefan Kraus, Daniel Lancaster, John Monnier et autres

The ASGARD/BIFROST instrument provides spectro-interferometric capability for the VLTI across the 1.0–1.8μm wavelength range. Central to this system is the All-in-One (AIO) 4-telescope beam combiner, which integrates beam routing, spatial filtering, and spectrograph injection within a compact optomechanical assembly. We present the …

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Seidr update: photonic 'black magic' for high-contrast interferometry using kernel-nulling and photonic lanterns

Nathan K. Long, Daniel S Dahl, Christopher H. Betters, Julia J Bryant et autres

Seidr is a new interferometric beam combiner within the Asgard Suite, utilizing infrastructure common to the BIFROST instrument at the Very Large Telescope Interferometer. Seidr combines hybrid mode-selective photonic lantern injection modules with a kernel-nulling photonic chip backend to enable deep H-band …

Seidr update: photonic 'black magic' for high-contrast interferometry using kernel-nulling and photonic lanterns

Nathan K. Long, Daniel S Dahl, Christopher H. Betters, Julia J Bryant et autres

Seidr is a new interferometric beam combiner within the Asgard Suite, utilizing infrastructure common to the BIFROST instrument at the Very Large Telescope Interferometer. Seidr combines hybrid mode-selective photonic lantern injection modules with a kernel-nulling photonic chip backend to enable deep H-band …

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The electrical and firmware implementation of BIFROST

Daniel Lancaster, Owain Snaith, Stefan Kraus, Jyotirmay Paul et autres

Delay line actuator design and testing for the BIFROST instrument

Daniel Lancaster, Stefan Kraus, Owain Snaith, Jyotirmay Paul et autres

BIFROST is a near-infrared (1 − 1.7μm) beam combiner and spectrograph that will be installed at the Very Large Telescope Interferometer (VLTI) as part of the ASGARD array. To achieve fringes with an astronomi- cal interferometer the beams of each telescope must …

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Seidr update: photonic ‘black magic’ for high-contrast interferometry using kernel-nulling and photonic lanterns

Nathan K. Long, Daniel S. Dahl, Christopher H. Betters, Julia J. Bryant et autres

Seidr is a new interferometric beam combiner within the Asgard Suite, utilizing infrastructure common to the Bifrost instrument at the Very Large Telescope Interferometer. Seidr combines hybrid mode-selective photonic lantern injection modules with a kernel-nulling photonic chip backend to enable deep H-band …

au, fr, gb, nl (code pays fourni par la source)

First Fringes for Asgard — Phase 1

Michael Ireland, Frantz Martinache, Stefan Kraus, Denis Defrère et autres

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 …

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