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arXiv 1809.03512astro-ph.IMastro-ph.GA
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宽积分视场红外光谱仪的调试结果和空中性能

The Wide Integral Field Infrared Spectrograph: Commissioning Results and On-sky Performance

Suresh Sivanandam, Dae-Sik Moon, R. Elliot Meyer, Jason Grunhut, Dennis Zaritsky, Joshua Eisner, Ke Ma, Charles Henderson, Basil Blank, Chueh-Yi Chou, Miranda E… 展开作者

Suresh Sivanandam, Dae-Sik Moon, R. Elliot Meyer, Jason Grunhut, Dennis Zaritsky, Joshua Eisner, Ke Ma, Charles Henderson, Basil Blank, Chueh-Yi Chou, Miranda E. Jarvis, Stephen Eikenberry, Moo-Young Chun, Byeong-Gon Park

摘要:

我们最近委托了一种新的红外($0.9-1.7$ $μ$ m)积分场光谱仪(IFS)称为宽积分场红外光谱仪(WIFIS)。WIFIS是一种独特的仪器,在美国基特峰的2.3米博克望远镜上提供非常大的视场(50 $^{\prime\prime}$ x 20 $^{\prime\prime}$),用于中等光谱分辨率的有限观测。测量的空间采样尺度为$\sim1\times1^{\prime\prime}$,其光谱分辨率分别为$zJ$($0.9-1.35$ $μ$ m)和$H_{short}$($1.5-1.7$ $μ$ m)模式下的$R\sim2,500$和$3,000$。WIFIS的相应光学扩展量大于现有的近红外(NIR)IFS,后者主要设计用于自适应光学系统,因此具有非常窄的视场。由于这个原因,该仪器特别适合研究近红外的非常广泛的物体,如超新星遗迹,银河系恒星形成区和附近的星系,这些物体不容易被其他NIR IFS访问。这使得原本不可能的科学计划成为可能,例如对大量邻近星系的详细调查或对银河系超新星遗迹的核合成产量的全面核算。WIFI的设计也很容易适应更大的望远镜。在本文中,我们报告了仪器的整体性能特征,这些特征是在2017年下半年的调试运行中测量的。我们目前的测量光谱分辨率,图像质量,仪器背景,整体效率和灵敏度的WIFIS和比较他们与我们的设计预期。最后,我们提出了一些示例观察,证明了WIFIS对扩展对象进行红外成像光谱的全部能力,这是由我们的自定义数据简化管道实现的。

英文摘要:

We have recently commissioned a novel infrared ($0.9-1.7$ $μ$m) integral field spectrograph (IFS) called the Wide Integral Field Infrared Spectrograph (WIFIS). WIFIS is a unique instrument that offers a very large field-of-view (50$^{\prime\prime}$ x 20$^{\prime\prime}$) on the 2.3-meter Bok telescope at Kitt Peak, USA for seeing-limited observations at moderate spectral resolving power. The measured spatial sampling scale is $\sim1\times1^{\prime\prime}$ and its spectral resolving power is $R\sim2,500$ and $3,000$ in the $zJ$ ($0.9-1.35$ $μ$m) and $H_{short}$ ($1.5-1.7$ $μ$m) modes, respectively. WIFIS's corresponding etendue is larger than existing near-infrared (NIR) IFSes, which are mostly designed to work with adaptive optics systems and therefore have very narrow fields. For this reason, this instrument is specifically suited for studying very extended objects in the near-infrared such as supernovae remnants, galactic star forming regions, and nearby galaxies, which are not easily accessible by other NIR IFSes. This enables scientific programs that were not originally possible, such as detailed surveys of a large number of nearby galaxies or a full accounting of nucleosynthetic yields of Milky Way supernova remnants. WIFIS is also designed to be easily adaptable to be used with larger telescopes. In this paper, we report on the overall performance characteristics of the instrument, which were measured during our commissioning runs in the second half of 2017. We present measurements of spectral resolving power, image quality, instrumental background, and overall efficiency and sensitivity of WIFIS and compare them with our design expectations. Finally, we present a few example observations that demonstrate WIFIS's full capability to carry out infrared imaging spectroscopy of extended objects, which is enabled by our custom data reduction pipeline.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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