Herschel : the first science highlights Special feature L etter to the E ditor The Photodetector Array Camera and Spectrometer ( PACS ) on the Herschel Space Observatory
Herschel : the first science highlights Special feature L etter to the E ditor The Photodetector Array Camera and Spectrometer ( PACS ) on the Herschel Space Observatory
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发表时间：
2010
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通讯作者：
A. Poglitsch;C. Waelkens;N. Geis;H. Feuchtgruber;B. Vandenbussche;L. Rodriguez;O. Krause;E. Renotte-E
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作者：
A. Poglitsch;C. Waelkens;N. Geis;H. Feuchtgruber;B. Vandenbussche;L. Rodriguez;O. Krause;E. Renotte-E
光电探测器阵列照相机和光谱仪是欧空局远红外和亚毫米观测台的三个科学仪器之一。它采用两个16 × 25像素的Ge：Ga光电导体阵列（应力和非应力），以及两个分别为16 × 32和32 × 64像素的填充硅测辐射热计阵列，以在60−210 μm波长范围内执行积分场光谱学和成像光度学。在测光模式下，它同时成像两个波段，60−85 μm或85−125 μm和125−210 μm，视场为1.75′ ×3.5′，每个波段的采样接近奈奎斯特光束。在光谱模式下，它成像的视场为47 ″ × 47 ″，分辨率为5 × 5像素，瞬时光谱覆盖范围为1500 km s−1，光谱分辨率为175 km s−1。我们总结了仪器的设计，描述了观测模式，校准和数据分析方法，并提出了我们目前的评估仪器的在轨性能的基础上的性能验证测试。PACS已全面投入使用，实现的性能接近或优于发布前的预测。
The Photodetector Array Camera and Spectrometer (PACS) is one of the three science instruments on ESA’s far infrared and submillimetre observatory. It employs two Ge:Ga photoconductor arrays (stressed and unstressed) with 16 × 25 pixels, each, and two filled silicon bolometer arrays with 16 × 32 and 32 × 64 pixels, respectively, to perform integral-field spectroscopy and imaging photometry in the 60−210 μm wavelength regime. In photometry mode, it simultaneously images two bands, 60−85 μm or 85−125 μm and 125−210 μm, over a field of view of ∼1.75′ ×3.5′, with close to Nyquist beam sampling in each band. In spectroscopy mode, it images a field of 47′′ × 47′′, resolved into 5 × 5 pixels, with an instantaneous spectral coverage of ∼ 1500 km s−1 and a spectral resolution of ∼175 km s−1. We summarise the design of the instrument, describe observing modes, calibration, and data analysis methods, and present our current assessment of the in-orbit performance of the instrument based on the performance verification tests. PACS is fully operational, and the achieved performance is close to or better than the pre-launch predictions.