标题： 一种校正近红外光谱大气吸收的方法 显示英文标题

标题： A Method of Correcting Near-Infrared Spectra for Telluric Absorption

摘要： 我们提出一种方法，用于校正近红外中等分辨率光谱中的地表吸收。该方法利用一颗A0V型恒星的光谱，该恒星在时间上接近目标天体，并且在空气质量上相近，以及维加的高分辨率模型，来构建一个不含恒星吸收特征的地表校正光谱。该技术专门设计用于对在NASA红外望远镜设施上的SpeX获取的光谱进行地表校正，SpeX是一个0.8-5.5微米的中等分辨率交叉色散光谱仪，并利用了在中等分辨率下存在不受大气吸收线污染的光谱区域这一事实。然而，它也可以（以稍作修改的形式）应用于其他近红外光谱仪获取的光谱。一个基于IDL的代码可用于从IRTF网站通过万维网下载。 显示英文摘要

摘要： We present a method for correcting near-infrared medium-resolution spectra for telluric absorption. The method makes use of a spectrum of an A0V star, observed near in time and close in airmass to the target object, and a high-resolution model of Vega, to construct a telluric correction spectrum that is free of stellar absorption features. The technique was designed specifically to perform telluric corrections on spectra obtained with SpeX, a 0.8-5.5 micron, medium-resolution cross-dispersed spectrograph at the NASA Infrared Telescope Facility, and uses the fact that for medium resolutions there exist spectral regions uncontaminated by atmospheric absorption lines. However, it is also applicable (in a somewhat modified form) to spectra obtained with other near-infrared spectrographs. An IDL-based code that carries out the procedures is available for downloading via the World Wide Web from the IRTF website.