Final design and on-sky testing of the iLocater SX acquisition camera: broad-band single-mode fibre coupling
| Autor: | B Sands, Jonathan Crass, Ryan Ketterer, M Vansickle, J. Kent Wallace, J Smous, Steve Ertel, Amali Vaz, C Shelton, David A. King, Eleanya Onuma, David Cavalieri, R Hamper, Gustavo Rahmer, Andrew Bechter, Jennifer Power, Derek Kopon, Manny Montoya, S Mullin, Olivier Durney, Robert G. Reynolds, M Engstrom, Joseph Thomes, Eric B. Bechter, Justin R. Crepp |
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| Rok vydání: | 2020 |
| Předmět: |
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences law.invention 010309 optics Telescope Primary mirror Optics law 0103 physical sciences Broadband Spectral resolution Adaptive optics Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics Spectrograph Astrophysics::Galaxy Astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Earth and Planetary Astrophysics (astro-ph.EP) Physics business.industry Astrophysics::Instrumentation and Methods for Astrophysics Single-mode optical fiber Astronomy and Astrophysics Large Binocular Telescope Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics::Earth and Planetary Astrophysics Astrophysics - Instrumentation and Methods for Astrophysics business Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 501:2250-2267 |
| ISSN: | 1365-2966 0035-8711 |
| Popis: | Enabling efficient injection of light into single-mode fibers (SMFs) is a key requirement in realizing diffraction-limited astronomical spectroscopy on ground-based telescopes. SMF-fed spectrographs, facilitated by the use of adaptive optics (AO), offer distinct advantages over comparable seeing-limited designs, including higher spectral resolution within a compact and stable instrument volume, and a telescope independent spectrograph design. iLocater is an extremely precise radial velocity (EPRV) spectrograph being built for the Large Binocular Telescope (LBT). We have designed and built the front-end fiber injection system, or acquisition camera, for the SX (left) primary mirror of the LBT. The instrument was installed in 2019 and underwent on-sky commissioning and performance assessment. In this paper, we present the instrument requirements, acquisition camera design, as well as results from first-light measurements. Broadband single-mode fiber coupling in excess of 35% (absolute) in the near-infrared (0.97-1.31{\mu}m) was achieved across a range of target magnitudes, spectral types, and observing conditions. Successful demonstration of on-sky performance represents both a major milestone in the development of iLocater and in making efficient ground-based SMF-fed astronomical instruments a reality. Comment: 18 pages, 17 figures. Accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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