小行星观测表ISO LWS
Catalogue of ISO LWS observations of asteroids
摘要：
红外空间天文台（ISO）上的长波光谱仪（LWS）多次观测了四颗大型主带小行星（1）谷神星，（2）智神星，（4）灶神星和（10）仙女座。光度和光谱数据涵盖了43和197微米之间的波长范围，是未来调查和详细表征这些机构的独特数据集。通过最后一个任务后LWS管道制作的标准ISO档案产品仍然受到仪器伪影的影响。我们的目标是提供最好的数据产品，以充分利用这些观测的科学潜力。我们对所有测量值进行了精确的还原，对各种仪器效应进行了校正，并重新校准了数据。我们概述了数据简化过程，并概述了可用的数据和观测的质量。我们应用一个热物理模型的流量测量，以获得远红外线为基础的小行星的直径和辐射值。（4）Vesta的热旋转光变曲线的测量值与模型预测值进行了比较。数据产品的绝对光度精度优于10%。校准后的光谱将作为未来矮行星和矮行星候选者的矿物学研究的来源。
英文摘要：
(Abridged) The Long Wavelength Spectrometer (LWS) onboard the Infrared Space Observatory (ISO) observed the four large main-belt asteroids (1) Ceres, (2) Pallas, (4) Vesta, and (10) Hygiea multiple times. The photometric and spectroscopic data cover the wavelength range between 43 and 197 um, and are a unique dataset for future investigations and detailed characterisations of these bodies. The standard ISO archive products, produced through the last post-mission LWS pipeline, were still affected by instrument artefacts. Our goal was to provide the best possible data products to exploit the full scientific potential of these observations. We performed a refined reduction of all measurements, corrected for various instrumental effects, and re-calibrated the data. We outline the data reduction process and give an overview of the available data and the quality of the observations. We apply a thermophysical model to the flux measurements to derive far-IR based diameter and albedo values of the asteroids. The measured thermal rotational lightcurve of (4) Vesta is compared to model predictions. The absolute photometric accuracy of the data products was foubd to be better than 10%. The calibrated spectra will serve as source for future mineralogical studies of dwarf planets and dwarf planet candidates.
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