TY - JOUR
T1 - Stable Fiber-illumination for Extremely Precise Radial Velocities with NEID
AU - Kanodia, Shubham
AU - Lin, Andrea S.J.
AU - Lubar, Emily
AU - Halverson, Samuel
AU - Mahadevan, Suvrath
AU - Bender, Chad F.
AU - Logsdon, Sarah E.
AU - Ramsey, Lawrence W.
AU - Ninan, Joe P.
AU - Stefánsson, Gumundur
AU - Monson, Andrew
AU - Schwab, Christian
AU - Roy, Arpita
AU - Paredes, Leonardo A.
AU - Golub, Eli
AU - Higuera, Jesus
AU - Klusmeyer, Jessica
AU - McBride, William
AU - Blake, Cullen
AU - Diddams, Scott A.
AU - Grisé, Fabien
AU - Gupta, Arvind F.
AU - Hearty, Fred
AU - McElwain, Michael W.
AU - Rajagopal, Jayadev
AU - Robertson, Paul
AU - Terrien, Ryan C.
N1 - Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/9/1
Y1 - 2023/9/1
N2 - NEID is a high-resolution red-optical precision radial velocity (RV) spectrograph recently commissioned at the WIYN 3.5 m telescope at Kitt Peak National Observatory, Arizona, USA. NEID has an extremely stable environmental control system, and spans a wavelength range of 380-930 nm with two observing modes: a High Resolution mode at R ∼ 112,000 for maximum RV precision, and a High Efficiency mode at R ∼ 72,000 for faint targets. In this paper we present a detailed description of the components of NEID’s optical fiber feed, which include the instrument, exposure meter, calibration system, and telescope fibers. Many parts of the optical fiber feed can lead to uncalibratable RV errors, which cannot be corrected for using a stable wavelength reference source. We show how these errors directly cascade down to performance requirements on the fiber feed and the scrambling system. We detail the design, assembly, and testing of each component. Designed and built from the bottom-up with a single-visit instrument precision requirement of 27 cm s−1, close attention is paid to the error contribution from each NEID subsystem. Finally, we include the lab and on-sky tests performed during instrument commissioning to test the illumination stability, and discuss the path to achieving the instrumental stability required to search for a true Earth twin around a solar-type star.
AB - NEID is a high-resolution red-optical precision radial velocity (RV) spectrograph recently commissioned at the WIYN 3.5 m telescope at Kitt Peak National Observatory, Arizona, USA. NEID has an extremely stable environmental control system, and spans a wavelength range of 380-930 nm with two observing modes: a High Resolution mode at R ∼ 112,000 for maximum RV precision, and a High Efficiency mode at R ∼ 72,000 for faint targets. In this paper we present a detailed description of the components of NEID’s optical fiber feed, which include the instrument, exposure meter, calibration system, and telescope fibers. Many parts of the optical fiber feed can lead to uncalibratable RV errors, which cannot be corrected for using a stable wavelength reference source. We show how these errors directly cascade down to performance requirements on the fiber feed and the scrambling system. We detail the design, assembly, and testing of each component. Designed and built from the bottom-up with a single-visit instrument precision requirement of 27 cm s−1, close attention is paid to the error contribution from each NEID subsystem. Finally, we include the lab and on-sky tests performed during instrument commissioning to test the illumination stability, and discuss the path to achieving the instrumental stability required to search for a true Earth twin around a solar-type star.
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U2 - 10.3847/1538-3881/acea60
DO - 10.3847/1538-3881/acea60
M3 - Article
AN - SCOPUS:85168475342
SN - 0004-6256
VL - 166
JO - Astronomical Journal
JF - Astronomical Journal
IS - 3
M1 - 105
ER -