The absorbing cells for the NIR spectrograph GIANO-B@TNG

R. Claudi; A. Ghedina; M. Aliverti; L. Cabona; S. Stefani; A. Tozzi; I. Carleo; V. D'Orazi; A. F. Lanza; G. Micela; E. Pace; G. Piccioni; M. Rainer; U. Seeman; J. S. Liù

doi:10.1117/12.2630124

29 August 2022 The absorbing cells for the NIR spectrograph GIANO-B@TNG

R. Claudi, A. Ghedina, M. Aliverti, L. Cabona, S. Stefani, A. Tozzi, I. Carleo, V. D'Orazi, A. F. Lanza, G. Micela, E. Pace, G. Piccioni, M. Rainer, U. Seeman, J. S. Liù

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121844W (2022) https://doi.org/10.1117/12.2630124
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

In 2014 TNG also offered GIANO-B to the scientific community, providing a near-infrared (NIR) cross-dispersed echelle spectrograph covering 0.97 − 2.45 µm at a resolution of 50000. The possibility of simultaneously using GIANO-B together with the HARPS-N spectrograph (GIARPS observing mode) has been particularly appealing especially for the search of exoplanets by means high precision radial velocities. Moreover, GIANO-B triggered the possibility to observe in the NIR the Sun as a star by means of LOCNES, a solar telescope that feeds the spectrograph by a bundle of NIR fibers, for study the activity of the Sun as a star in the NIR wavelength range and its impact on the radial velocity measurements. Both science cases, include high-precision radial-velocity studies down to 3 m/s which demand for specialized, highly accurate wavelength calibration techniques. In this paper we present a developed absorption gas-cell to enable high-precision wavelength calibration for GIANO-B as a modified model of the CRIRES+ Absorbing Cell. We also discuss the manufacturing difficulties and the new design of the vessel. Furthermore, the AIT and the commissioning of the cells is also reported.

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R. Claudi, A. Ghedina, M. Aliverti, L. Cabona, S. Stefani, A. Tozzi, I. Carleo, V. D'Orazi, A. F. Lanza, G. Micela, E. Pace, G. Piccioni, M. Rainer, U. Seeman, and J. S. Liù "The absorbing cells for the NIR spectrograph GIANO-B@TNG", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121844W (29 August 2022); https://doi.org/10.1117/12.2630124

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