Progress on the UV-VIS arm of SOXS

TL;DR

This paper reports on the final design, construction progress, and expected performance of the UV-VIS arm of the SOXS spectrograph for the NTT, highlighting key developments and throughput estimates.

Contribution

It presents the final design, manufacturing performance, and assembly progress of the UV-VIS arm of SOXS, advancing the instrument towards operational readiness.

Findings

Expected throughput >55% for the visual arm

Final design completed and passed review

Progress in assembly and manufacturing

Abstract

We present our progress on the UV-VIS arm of Son Of X-Shooter (SOXS), a new spectrograph for the NTT. Our design splits the spectral band into four sub-bands that are imaged onto a single detector. Each band uses an optimized high efficiency grating that operates in 1st order (m=1). In our previous paper we presented the concept and preliminary design. SOXS passed a Final Design Review in July 2018 and is well into the construction phase. Here we present the final design, performances of key manufactured elements, and the progress in the assembly. Based on the as-built elements, the expected throughput of the visual arm will be >55%. This paper is accompanied by a series of contributions describing the progress made on the SOXS instrument.