Herschel/PACS点源星表补充说明
The Herschel/PACS Point Source Catalogue Explanatory Supplement
摘要：
赫歇尔空间天文台是欧洲航天局（欧空局）科学方案的第四个基石飞行任务。它在远红外和电磁波谱的亚毫米部分具有出色的宽带成像能力。虽然该航天器在2013年完成了观测，但它留下了一个庞大的遗留数据集，远未得到充分探索，仍然具有巨大的新科学发现潜力。PACS和SPIRE测光相机在六个不同的波段观测了大约8%的天空。本文件描述了Herschel/PACS点源星表（HPPSC），这是一个基于PACS仪器的宽带光度观测的FIR星表，中心滤光片为70、100和160微米。我们分析了14842个合并的2.5级/3级Herschel/PACS光度观测结果。PACS光度计图由Herschel交互处理环境（HIPE）v13.0.0的JScanam任务生成。利用SUSSEXtractor的HIPE实现来识别源，并且通过孔径测光获得通量密度。我们发现，在70微米的地图，131 322在100微米和251 392在160微米的地图被认为是可靠的点源，共108 319。此外，我们的质量控制算法确定了546 587个候选源，这些候选源被认为是扩展的，7 185 160个特征没有通过信噪比和其他标准被认为是可靠的源。这些污染源分别被列入HPPSC的扩展污染源清单和拒绝污染源清单。计算的完整性和光度精度值是基于模拟，其中人工源被注入到观测时间轴，具有良好控制的通量密度值。实际的完备性是源通量、光度带和背景复杂性的复函数。
英文摘要：
The Herschel Space Observatory was the fourth cornerstone mission in the European Space Agency (ESA) science programme. It had excellent broad band imaging capabilities in the far-infrared (FIR) and sub-millimetre part of the electromagnetic spectrum. Although the spacecraft finished observing in 2013, it left a large legacy dataset that is far from having been fully explored and still has a great potential for new scientific discoveries. The PACS and SPIRE photometric cameras observed about 8% of the sky in six different wavebands. This document describes the Herschel/PACS Point Source Catalogue (HPPSC), a FIR catalogue based on the broad-band photometric observations of the PACS instrument with filters centred at 70, 100 and 160 microns. We analysed 14842 combined, Level 2.5/Level 3 Herschel/PACS photometric observations. The PACS photometer maps were generated by the JScanam task of the Herschel Interactive Processing Environment (HIPE) v13.0.0. Sources were identified with the HIPE implementation of SUSSEXtractor, and the flux densities obtained by aperture photometry. We found a total of 108 319 point sources that are considered to be reliable in the 70 micron maps, 131 322 at 100 micron and 251 392 point sources in the 160 micron maps. In addition, our quality control algorithm identified 546 587 candidate sources that were found to be extended and 7 185 160 features which did not pass the signal-to-noise and other criteria to be considered reliable sources. These sources were included in the Extended Source List and Rejected Source List of the HPPSC, respectively. The calculated completeness and photometric accuracy values are based on simulations, where artificial sources were injected into the observational timeline with well controlled flux density values. The actual completeness is a complex function of the source flux, photometric band and the background complexity.
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