Spectrograph design for the Asgard/BIFROST spectro-interferometric instrument for the VLTI

@inproceedings{Chhabra2022SpectrographDF,
  title={Spectrograph design for the Asgard/BIFROST spectro-interferometric instrument for the VLTI},
  author={Sorabh Chhabra and Michele Frangiamore and Stefan Kraus and Andrea Bianco and Francisco Garz{\'o}n and John D. Monnier and Daniel J. Mortimer},
  booktitle={Astronomical Telescopes + Instrumentation},
  year={2022}
}
The BIFROST instrument will be the first VLTI instrument optimised for high spectral resolution up to R=25,000 and operate between 1.05 and 1.7 μm. A key component of the instrument will be the spectrograph, where we require a high throughput over a broad bandwidth. In this contribution, we discuss the four planned spectral modes (R=50, R=1000, R=5000, and R=25,000), the key spectral windows that we need to cover, and the technology choices that we have considered. We present our plan to use… 

High spectral-resolution interferometry down to one micron with Asgard/BIFROST at VLTI: science drivers and project overview

We present science cases and instrument design considerations for the BIFROST instrument that will open the short-wavelength (Y/J/H-band), high spectral dispersion (up to R=25,000) window for the VLT

High-angular and high-contrast VLTI observations from Y to M band with the Asgard instrumental suite

The Very Large Telescope Interferometer is one of the most proficient observatories in the world for high angular resolution. Since its first observations, it has hosted several interferometric

References

SHOWING 1-10 OF 19 REFERENCES

Beam combiner for the Asgard/BIFROST instrument

BIFROST will be a short-wavelength (λ = 1.0 - 1.7 μm) beam combiner for the VLT Interferometer, combining both high spatial (λ/2B = 0.8 mas) and spectral (up to R = 25,000) resolution. It will be

L-band nulling interferometry at the VLTI with Asgard/Hi-5: status and plans

Hi-5 is the L’-band (3.5-4.0 μm) high-contrast imager of Asgard, an instrument suite in preparation for the visitor focus of the VLTI. The system is optimized for high-contrast and high-sensitivity

High spectral-resolution interferometry down to one micron with Asgard/BIFROST at VLTI: science drivers and project overview

We present science cases and instrument design considerations for the BIFROST instrument that will open the short-wavelength (Y/J/H-band), high spectral dispersion (up to R=25,000) window for the VLT

High-angular and high-contrast VLTI observations from Y to M band with the Asgard instrumental suite

The Very Large Telescope Interferometer is one of the most proficient observatories in the world for high angular resolution. Since its first observations, it has hosted several interferometric

Design of the VLTI/Hi-5 light injection system

Hi-5 is an ERC-funded project hosted at KU Leuven and a proposed visitor instrument for the VLTI. Its primary goal is to image the snow line region around young planetary systems using nulling

Wavelength calibration sources for instruments on extremely large telescopes

Extremely large telescopes (ELTs) and most of their instruments will be optimized for operating in the near infrared (IR) because of the wavelength dependent performance of adaptive optics. Few

Astronomical interferometry with near-IR e-APD at CHARA: characterization, optimization and on-sky operation

We characterize a near-infrared C-RED ONE camera from First Light Imaging (FLI). This camera uses a SAPHIRA electron avalanche photo-diode array (e-APD) from Leonardo (previously Selex). To do so, we

NIRPS: an adaptive-optics assisted radial velocity spectrograph to chase exoplanets around M-stars

Since 1st light in 2002, HARPS has been setting the standard in the exo-planet detection by radial velocity (RV) measurements[1]. Based on this experience, our consortium is developing a high

Image-plane fringe tracker for adaptive-optics assisted long baseline interferometry

Accurate fringe tracking is essential for sensitive long-wavelength thermal background limited operation of the current Very Large Telescope Interferometry (VLTI) and future Planet Formation Imager

Development of the four-telescope photonic nuller of Hi-5 for the characterization of exoplanets in the mid-IR

A small-footprint 4-telescope photonic beam combiner is at the heart of the Hi-5 instrument, the high-contrast VLTI visitor instrument focusing on the detection and characterization of young