4MOST: status of the high resolution spectrograph

W. Seifert; W. Xu; P. Buschkamp; C. Feiz; A. ElHaddad; A. Saviauk; A. Quirrenbach; H. Mandel

doi:10.1117/12.2311609

8 July 2018 4MOST: status of the high resolution spectrograph

W. Seifert, W. Xu, P. Buschkamp, C. Feiz, A. ElHaddad, A. Saviauk, A. Quirrenbach, H. Mandel

Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII; 107027B (2018) https://doi.org/10.1117/12.2311609
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

4MOST (4-meter Multi-Object Spectroscopic Telescope) is a wide-field, fiber-feed, high-multiplex spectroscopic survey facility to be installed on the 4-meter ESO telescope VISTA in Chile. Its backend consists of one high resolution spectrograph and two identical low resolution spectrographs. The instrument is presently in the final design phase (review in May 2018) and is expected to enter full operations at the beginning of 2023 ([1] and [2]). The high resolution spectrograph (HRS) will afford simultaneous observations of up to 812 targets – over a hexagonal field of view of ~ 4.1 square degrees on sky – with a spectral resolution R>18,000 covering wavelength ranges between 393 and 679 nm in three channels. The optical design of the instrument is described in detail in [5]. In February 2017 the final design review for the optics was held and passed successfully. The final design review for the mechanics and all other parts of the instrument was held in May 2018. A summary and update of the optical and mechanical design of the HRS are presented in this paper. The detailed status of the manufacturing of the optics is given. The procedures and tools used during the AIT phase for the optical alignment of the HRS system, as well as the performance tests and characterizations are described.

Citation Download Citation

W. Seifert, W. Xu, P. Buschkamp, C. Feiz, A. ElHaddad, A. Saviauk, A. Quirrenbach, and H. Mandel "4MOST: status of the high resolution spectrograph", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107027B (8 July 2018); https://doi.org/10.1117/12.2311609

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KEYWORDS

Sensors

Cameras

Telescopes

Camera shutters

Optics manufacturing

Spectrographs

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