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题名	丽江高美古观测站大气消光系数测定的初步结果
作者	胡波
学位类别	硕士
答辩日期	2009-06-24
授予单位	中国科学院研究生院（云南天文台）
授予地点	北京
导师	袁为民
关键词	实测 大气消光 星等归化 光学证认
学位专业	天体物理
中文摘要	由于大气分子和粒子的散射和吸收，来自天体的辐射在经过大气时，不仅 减弱了天体的流量而且改变了天体的能谱分布。因此，对于地基天文观测来说， 为了得到天体的真实辐射，考虑地球大气的消光影响是至关重要的。同时因各 种望远镜有不同的响应，将观测值通过消光改正后得到的本系统观测值与标准 星等系统进行系统归划也是一项必不可少的实测工作，故对于天文望远镜，观 测天文站点的大气消光影响和对观测星等系统与标准星等系统间进行转换关系 的测定是进行观测的基本定标过程。 在本文中，我们给出了丽江高美古站点的大气消光和2.4米光学望远镜观测 系统与Landolt标准系统的星等转换关系的一些初步结果。2008年-2009年，我们 用丽江高美古2.4米光学望远镜取得一系列Landolt星场的标准星在U,B,V,R,I波 段的观测数据。我系统地学习了天文望远镜的观测和光学测光数据处理分析， 利用IRAF天文软件包得到这些标准星的仪器星等，数据的分析则采用IDL语言 编程。最终，对几个稳定夜的观测数据进行分析，我们得到了上述5个波段的大 气消光系数和2.4米望远镜观测系统的星等转换关系。 此外，本文还介绍了另外两个方面的工作。一个是利用SDSS巡天的光谱观 测源对XMM-Newton X-射线移动巡天观测进行光学证认的初步结果。我们分 析并证认了7个新X-ray源的小样本，并给出部分源的光谱图，它们都是前人未 发现的活动星系核。另一项工作是关于太阳系外行星的探测和观测技术的调研， 调研的重点集中在LiJET项目，该项目是将要在丽江高美古2.4米光学望远镜上 执行的太阳系外行星的观测计划。
英文摘要	Light from celestial objects, when passing through the Earth's atmosphere,is subject to attenuation in °ux and change in spectral shape due to extinction which is caused by the effects of scattering and absorption by atmospheric particles and molecules. It is therefore essential to quantify the amount of extinction in order to measure the true radiation from celestial objects in ground-based as-tronomical observations in the optical band. Besides, on account of instrumental response, including telescope,detector and optical filter applicated in observation,transformed to the standard system is a necessary section. So, The measurement of atmospheric extinction of the site, as well as the determination of the transformations of the natural photometric system to the standard magnitude system,are among the basic calibration procedures for an astronomical telescope. In this thesis, I present preliminary results as part of our undergoing efforts to measure the atmospheric extinction and to calibrate the photometric sys-tem for the newly commissioned 2.4m telescope of Yunnan Observatory at the Gaomeigu observatory of Lijiang. For this purpose we have carried out observations at the 2.4m telescope, by observing sets of Landolt's standard star fields, in several observational runs in 2008-2009 in the U,B,V,R,I filters. I have systematically learned astronomical observations using telescopes and optical photometric data reduction and analysis. The reduction of the observed photometric data was performed using IRAF and the analysis of the data using IDL programming.As results, we derived the extinction coecients for the above 5 bands for some of the nights with acceptable data quality. We also give the mean extinction coefficients. Meanwhile, the transformations from the 2.4m photometric system to the standard magnitude system are also obtained for the five bands. In addition, two independent pieces of work are also presented. The first is on preliminary result of optical spectroscopic identication of the XMM-Newton X-ray Slew Survey sources which were observed in the SDSS spectroscopic survey.A small sample of seven new X-ray sources are identied, whose SDSS spectra are partly presented. They are all classied as active galactic nuclei, which were previously unknown. The second is a review on the detection of exoplanets and observational techniques, with the emphasis given to the LiJET project, an ongoing exo-planet project to be carried out at the Lijiang 2.4m telescope.
语种	中文
学科主题	天文学
页码	122
内容类型	学位论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5081]
专题	云南天文台_高能天体物理研究组
推荐引用方式 GB/T 7714	胡波. 丽江高美古观测站大气消光系数测定的初步结果[D]. 北京. 中国科学院研究生院（云南天文台）. 2009.

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