共查询到19条相似文献，搜索用时 421 毫秒
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简要地阐述了恒星光电测光工作中的常规数据处理方法及应该注意的一些问题。对食双星电测光这一领域的观测数据处理进行了概述,给出了ＢＶ双色光电测光观测数据处理软件包的编程思想及具体实现。最后介绍了这个软件包的使用情况和结果。 相似文献
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《天文研究与技术》2021,(4)
位于吉林天文观测基地的280 mm全天区可转动光电阵是一台用于空间碎片巡天观测的设备。为了研究该设备的光度测量性能,评估其测光精度,选择M67疏散星团中的测光标准星进行观测。首先,在IRAF(Image Reduction and Analysis Facility)中对观测图像进行预处理,之后进行较差测光;接着,提取测光数据并将整晚观测数据进行最小二乘直线拟合,拟合结果给出了主消光系数及相应的系统转换系数,并得到仪器星等至标准星等的转换公式;最后,利用计算得到的均方根误差对设备的测光精度进行大致评估。计算结果表明,在标准测光夜测量亮于13.8 mag时,280 mm全天区可转动光电阵的测光精度可达0.13 mag。同时将观测图像与UCAC2星表匹配识别,利用背景恒星中的UCAC2标准星做外符合精度的校验,结果与前者基本相同。本设备的测光精度基本满足空间碎片巡天观测的要求。 相似文献
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介绍中法双方分别于１９９５年和１９９７年对ＤＡ型脉动白矮星Ｇ２５５—２进行的两次高精度的光电测光联合观测．在仔细的数据处理之后进行了多重频率脉动分析,得到了该星的本征脉动模式．同时,结合ＤＡ型脉动白矮星的理论模型进行了初步的星震学分析． 相似文献
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介绍中法双方分别于１９９５年对ＤＡ型脉动白矮星Ｇ２５５－２进行的两次高精度的光电测光联合观测,在仔细的数据处理之后 进行了多重频率脉动分析,得到了该星的本征脉动模式,同时,结合ＤＡ型脉动白矮星的理论模型进行了初步的星震学分析。 相似文献
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1.26m红外望远镜是一台由国家天文台和广州大学联合建设的望远镜系统,测光观测是该望远镜的重要观测手段之一。但当前一直存在数据处理周期较长、处理过程需要人工处理等问题。为了提高广州大学合作团队的数据处理能力,提出了一种面向1.26 m红外望远镜半自动的测光处理管线,该管线在获取原始数据后,基于当日的观测记录重建FITS头文件信息,随后管线系统自动对图片进行预处理、定位目标星源、计算出目标星等相关操作,最后获得可利用的测光数据。这种方式高效、便捷,同时精度也得到了保证,它把当前主流测光模式中繁杂的、需要不断重复的步骤交由程序运行,从而节省了时间,显著提高了工作效率,解决了当前光学测光模式中图像数据的处理跟不上数据产出的难题,满足了广大科研工作者的需求。 相似文献
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Yang Tinggao 《时间频率学报》1995,(1)
根据对鬼星团中Ｊｏｈｎｓｏｎ测光标准星的观测，我们研究了北京天文台６０ｃｍ望远镜直流光电光度计ＵＢＶ测光系统的转换方程．应用该方程推算了对三颗变星观测得到的ＵＢＶ星等，讨论了所得光变曲线的精度，并与较差方法所得结果进行了比较 相似文献
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根据对鬼星团中Ｊｏｈｎｓｏｎ测光标准星的观测，我们研究了北京天文台６０ｃｍ望远镜直流光电光度法ＵＢＶ测光系统的转换方程，应用该方程推算了对三颗变星观测得到的ＵＢＶ星等，讨论了所得光变曲线的精度，并与较差方法所得结果进行了比较。 相似文献
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Chris Koen 《Monthly notices of the Royal Astronomical Society》1999,309(3):769-802
The estimation of the frequency, amplitude and phase of a sinusoid from observations contaminated by correlated noise is considered. It is assumed that the observations are regularly spaced, but may suffer missing values or long time stretches with no data. The typical astronomical source of such data is high-speed photoelectric photometry of pulsating stars. The study of the observational noise properties of nearly 200 real data sets is reported: noise can almost always be characterized as a random walk with superposed white noise. A scheme for obtaining weighted non-linear least-squares estimates of the parameters of interest, as well as standard errors of these estimates, is described. Simulation results are presented for both complete and incomplete data. It is shown that, in finite data sets, results are sensitive to the initial phase of the sinusoid. 相似文献
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K. OLÁH 《Experimental Astronomy》1994,5(1-2):3-7
The paper reviews generally well-known, though still frequently overlooked, procedural points in photoelectric photometry. Some examples, which point up the value of high photometric precision, are included. 相似文献
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《Chinese Astronomy and Astrophysics》1983,7(2):86-91
This paper gives the results of narrow-band (Hγ and Hδ) photoelectric photometry of Vela X-1 made in February 1981 and discusses the possible periods from a spectral analysis. Spectral data in the same object obtained in April 1980 are also given. There appears to be clear correlations when compared with the sudden change in its X-ray pulse period during this time. 相似文献
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The paper outlines progress to date on total magnitude determinations, luminosity profiles and colour distributions on a programme for galaxies of large apparent size, with an emphasis on conventional photoelectric photometry. 相似文献
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本文报告了数据采集和控制软件ＣＭＵＯＰＰＳ的研制情况，这个软件是云南天文台密近双星研究组为泰国清迈大学天文台研制的光子计数式光电测光系统的专用配套软件。文中给出了硬件接口的性能及软件和硬件握手的方案，介绍了软件的总体概况，还说明了软件的使用环境和使用方法。最后给出了实验室测试和试观测过程中软件的运行情况及结果。 相似文献
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本文主要介绍GDJ打印经纬仪经光电改装后的系统特点及新的观测方法,并由此而获取的效益。 相似文献
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J. B. Hearnshaw V. J. McIntyre A. C. Gilmore 《Journal of Astrophysics and Astronomy》1988,9(2):93-106
This paper describes the results of optical spectroscopy of SN1987a carried out at Mt John University Observatory on a regular
basis since 1987 February 25. Typical spectra are presented in an evolutionary sequence, and velocities of Balmer and selected
metallic lines are measured in either emission or absorption. The velocities are interpreted together with the results of
photoelectric photometry. The Barnes-Evans relationship has been applied to the photometry to give an angular diameter of
the photosphere. The expansion velocity of the photosphere is initially about 3700 km s-1 which is similar to the asymptotic value from weaker absorption lines such as the MgIb line. After 40 days the photosphere
appears to expand more slowly and it reaches a maximum size of about 145 A.U. after about 100 days before receding inwards.
The photometry and spectroscopy together result in a distance modulus of 18.3 ± 0.2. 相似文献
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He Miaofu Zhu Wenyao Feng Chugang Huang Cheng Chang Hua 《Celestial Mechanics and Dynamical Astronomy》1988,45(1-3):61-64
As one of the Analysis Centers of SLR global data, a program system named SHORDE I has been developed at Shanghai Observatory. This software package is used for processing observational data of satellites and estimating satellite orbit and dynamical and geodetic parameters. The reference systems and the force model required for constructing the package were first realized at the cm-level. In order to save running time and the storage on the computer, a multistage-multiarc procedure has been especially designed.The technique has been applied to the SLR data from LAGEOS and earth rotation parameters and precise station coordinates were derived using the data from Nov. 1984 to Jan. 1988. 相似文献