SOFIA上FIFI-LS -场成像光谱仪的光谱和空间表征及标定

IF 1.5 Q3 ASTRONOMY & ASTROPHYSICS

Journal of Astronomical Instrumentation Pub Date : 2018-12-01 DOI:10.1142/s2251171718400044

S. Colditz, S. Beckmann, A. Bryant, C. Fischer, F. Fumi, N. Geis, M. Hamidouche, T. Henning, R. Hönle, C. Iserlohe, R. Klein, A. Krabbe, L. Looney, A. Poglitsch, W. Raab, F. Rebell, D. Rosenthal, M. Savage, M. Schweitzer, W. Vacca

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引用次数: 15

摘要

场成像远红外线光谱仪（FIFI-LS）是平流层红外天文观测站（SOFIA）的一种科学仪器。FIFI-LS允许在两个光谱通道中同时进行观测。“蓝色”通道从51[公式：见文本][公式：参见文本]m到125[公式：见图文本]m敏感，“红色”通道从115[公式：详见文本][配方：参见文本]m到203[公式：请见文本][方程式：见文本]m敏感。瞬时光谱覆盖范围在蓝色通道中为1000–3000[公式：见文本]km/s，在红色通道中为800–2500[公式：见图文本]km/s.光谱分辨率在150[公式：参见文本]km/s和600[公式：详见文本]km/s。每个光谱通道观测天空中五乘五的空间像素场。蓝色通道中的像素大小为6.14乘6.25平方弧秒，红色通道中的为12.2乘12.5平方弧秒。FIFI-LS自2014年以来一直在SOFIA上运营。它可作为设施科学仪器提供给天文学界。我们介绍了基于实验室测量的仪器光谱和空间特征的结果。这包括测量的光谱分辨率和谱域中的线扩展函数的示例。在空间域中，给出了仪器的点扩散函数（PSF）模型和二次通过重影的描述。我们还概述了用于测量仪器视场几何结构和光谱校准的程序。光谱校准的精度为15–60[公式：见正文]km/s，具体取决于波长。

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Spectral and Spatial Characterization and Calibration of FIFI-LS — The Field Imaging Spectrometer on SOFIA

The field-imaging far-infrared line spectrometer (FIFI-LS) is a science instrument for the Stratospheric Observatory for Infrared Astronomy (SOFIA). FIFI-LS allows simultaneous observations in two spectral channels. The “blue” channel is sensitive from 51[Formula: see text][Formula: see text]m to 125[Formula: see text][Formula: see text]m and the “red” channel from 115[Formula: see text][Formula: see text]m to 203[Formula: see text][Formula: see text]m. The instantaneous spectral coverage is 1000–3000[Formula: see text]km/s in the blue and 800–2500[Formula: see text]km/s in the red channel with a spectral resolution between 150[Formula: see text]km/s and 600[Formula: see text]km/s. Each spectral channel observes a field of five by five spatial pixels on the sky. The pixel size in the blue channel is 6.14 by 6.25 square arc seconds and it is 12.2 by 12.5 square arc seconds in the red channel. FIFI-LS has been operating on SOFIA since 2014. It is available to the astronomical community as a facility science instrument. We present the results of the spectral and spatial characterization of the instrument based on laboratory measurements. This includes the measured spectral resolution and examples of the line spread function in the spectral domain. In the spatial domain, a model of the instrument’s point spread function (PSF) and the description of a second pass ghost are presented. We also provide an overview of the procedures used to measure the instrument’s field of view geometry and spectral calibration. The spectral calibration yields an accuracy of 15–60[Formula: see text]km/s depending on wavelength.

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来源期刊

Journal of Astronomical Instrumentation ASTRONOMY & ASTROPHYSICS-

CiteScore

2.30

自引率

7.70%

发文量

期刊介绍： The Journal of Astronomical Instrumentation (JAI) publishes papers describing instruments and components being proposed, developed, under construction and in use. JAI also publishes papers that describe facility operations, lessons learned in design, construction, and operation, algorithms and their implementations, and techniques, including calibration, that are fundamental elements of instrumentation. The journal focuses on astronomical instrumentation topics in all wavebands (Radio to Gamma-Ray) and includes the disciplines of Heliophysics, Space Weather, Lunar and Planetary Science, Exoplanet Exploration, and Astroparticle Observation (cosmic rays, cosmic neutrinos, etc.). Concepts, designs, components, algorithms, integrated systems, operations, data archiving techniques and lessons learned applicable but not limited to the following platforms are pertinent to this journal. Example topics are listed below each platform, and it is recognized that many of these topics are relevant to multiple platforms. Relevant platforms include: Ground-based observatories[...] Stratospheric aircraft[...] Balloons and suborbital rockets[...] Space-based observatories and systems[...] Landers and rovers, and other planetary-based instrument concepts[...]