Pupil Scrambling Integral Field Unit (PSI) for the Robert Stobie Spectrograph on SALT

Pupil Scrambling Integral Field Unit (PSI) for the Robert Stobie Spectrograph on SALT
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SALT 上罗伯特·斯托比摄谱仪的瞳孔扰乱积分场单元 (PSI)

DOI:
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发表时间:
2016
期刊:
Astronomical Telescopes + Instrumentation
影响因子:
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通讯作者:
L. Bing
L. Bing
中科院分区:
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文献类型:
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作者:
Michael P. Smith;M. Wolf;M. Bershady;Guangwei Fu;L. Bing

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我们建议在南部非洲大望远镜(SALT)上为罗伯特·斯托比光谱仪(RSS)建立一个积分场单元(IFU)。该IFU (PSI)将利用光纤的置乱特性来解决由于观测期间瞳孔照明变化而导致的光子限制天空减法的基本问题。PSI将完全封装在一个紧凑的折叠方案中,在一个标准的长狭缝掩模中,比以前任何基于纤维的实现都薄得多。IFU将覆盖14 x 24弧秒的天空,实现光谱分辨率R≡λ/δλ高达6200,以及光子有限的天空减法,用于研究目前4m级仪器无法达到的星系周围微弱的延伸气体。它将采用新技术的八角形光纤芯,与远心瞳孔成像透镜耦合,以充分优化瞳孔置乱,并提供100%的整体天空覆盖。
We propose to build an integral field unit (IFU) for the Robert Stobie Spectrograph (RSS) on the Southern African Large Telescope (SALT). This IFU (PSI) will employ the scrambling properties of fibers to address fundamental problems in achieving photon-limited sky subtraction due to variations in pupil illumination during observations. PSI will be fully encapsulated with a compact folding scheme in a standard long slit mask—far thinner than any previous fiber-based implementation. The IFU will cover 14 x 24 arcsec on sky, achieving spectral resolution R ≡ λ/δλ up to 6200 and photon-limited sky subtraction for studies of faint extended gas around galaxies beyond the reach of current 4m-class instruments. It will incorporate new-technology octagonal shaped fiber cores coupled by telecentric, pupil-imaging lenslets to fully optimize pupil scrambling and provide 100% integral sky coverage.
DOI: 10.1088/0004-637x/798/1/7
发表时间: 2015-01-01
影响因子: 4.9
作者:
Bundy, Kevin;Bershady, Matthew A.;Zhang, Kai
通讯作者: Zhang, Kai