校正用于大地吸收的METIS光谱以最大化光谱保真度
Correcting METIS spectra for telluric absorption to maximize spectral fidelity
摘要：
METIS是为欧洲极大望远镜（E-ELT）提出的中红外仪器。它的设计提供成像和光谱能力在3 - 14微米区域高达光谱分辨率100000。METIS的新概念之一是用于衍射限制的中红外仪器的高分辨率积分场光谱仪（IFS）。虽然这个概念在科学和操作上比长缝摄谱仪有许多优点，但有一个缺点是光谱分辨率随视场变化。这对校正科学光谱上的大地吸收线的程序产生了影响。它们是寻求最大化光谱保真度的主要障碍，光谱保真度是从连续光谱中区分弱光谱特征的能力。用标准恒星光谱划分的经典技术，在一个IFS光谱中观察到的，不能简单地应用于所有的spaxels，因为光谱分辨率从spaxel到spaxel是变化的。在这里，我们提出并讨论可能的技术，大地线校正METIS IFS光谱，包括应用合成模型光谱的大地传输，以最大限度地提高光谱保真度。
英文摘要：
METIS is a mid-infrared instrument proposed for the European Extremely Large Telescope (E-ELT). It is designed to provide imaging and spectroscopic capabilities in the 3 - 14 micron region up to a spectral resolution of 100000. One of the novel concepts of METIS is that of a high-resolution integral field spectrograph (IFS) for a diffraction-limited mid-IR instrument. While this concept has many scientific and operational advantages over a long-slit spectrograph, one drawback is that the spectral resolution changes over the field of view. This has an impact on the procedures to correct for telluric absorption lines imprinted on the science spectra. They are a major obstacle in the quest to maximize spectral fidelity, the ability to distinguish a weak spectral feature from the continuum. The classical technique of division by a standard star spectrum, observed in a single IFS spaxel, cannot simply be applied to all spaxels, because the spectral resolution changes from spaxel to spaxel. Here we present and discuss possible techniques of telluric line correction of METIS IFS spectra, including the application of synthetic model spectra of telluric transmission, to maximize spectral fidelity.
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。
