The Dual-channel Extreme Ultraviolet Continuum Experiment (DEUCE) is a rocket-borne, ultraviolet spectrograph specifically designed to obtain the first flux-calibrated spectra of nearby B stars ϵ and β Canis Majoris (CMa) across the Lyman limit at 912 Å. These observations will help quantify the contribution of such stars to modern ionization in the intergalactic medium. The payload operates in two channels over the 700 to 1150 Å extreme ultraviolet/far ultraviolet (EUV/FUV) bandpass, with resolving powers of 180 (1850) and net effective areas (including slit transmission) of 4 cm2 ( . 15 cm2) in its large and small-slit channels, respectively. DEUCE features a large format 200 × 200 mm2 low-noise atomic layer deposition-activated microchannel plate detector of the type baselined for the Large Ultraviolet Optical Infrared (LUVOIR) Surveyor and has demonstrated its flight performance. DEUCE has obtained the first flux-calibrated spectrum of ϵ CMa from 730 to 895 Å. This paper outlines the science objectives, instrument design, calibration, launches, and observations of the mission.

中文翻译：

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DEUCE：探空火箭紫外光谱仪，用于在莱曼范围内通量校准的B星观测

双通道极端紫外线连续谱实验（DEUCE）是一种火箭载紫外线光谱仪，专门设计用于获取在912Å附近莱曼极限附近的B星ϵ和βCanis Majoris（CMa）的第一通量校准光谱。这些观察将有助于量化此类恒星对星际介质中现代电离的贡献。有效负载在700至1150Å极紫外/远紫外（EUV / FUV）带通中的两个通道中运行，分辨力为180（1850），净有效面积（包括狭缝透射）为4 cm2（。15 cm2）。其大缝隙通道和小缝隙通道。DEUCE具有大型200×200 mm2低噪声原子层沉积激活型微通道板检测器，该检测器是大型紫外线光学红外（LUVOIR）测量仪的基线类型，并已证明其飞行性能。DEUCE获得了从730到895Å的第一通量校准谱图CMa。本文概述了任务的科学目标，仪器设计，校准，发射和观测。