Development of a Period Analysis Algorithm for Detecting Variable Stars in Time-Series Observational Data

IF 0.6 Q4 ASTRONOMY & ASTROPHYSICS

Journal of Astronomy and Space Sciences Pub Date : 2019-12-01 DOI:10.5140/JASS.2019.36.4.283

Dong-Heun Kim, Yonggi Kim, Joh-Na Yoon, Hong-Seo Im

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引用次数: 0

Abstract

The purpose of this study was to develop a period analysis algorithm for detecting new variable stars in the time-series data observed by charge coupled device (CCD). We used the data from a variable star monitoring program of the CBNUO. The R filter data of some magnetic cataclysmic variables observed for more than 20 days were chosen to achieve good statistical results. World Coordinate System (WCS) Tools was used to correct the rotation of the observed images and assign the same IDs to the stars included in the analyzed areas. The developed algorithm was applied to the data of DO Dra, TT Ari, RXSJ1803, and MU Cam. In these fields, we found 13 variable stars, five of which were new variable stars not previously reported. Our period analysis algorithm were tested in the case of observation data mixed with various fields of view because the observations were carried with 2K CCD as well as 4K CCD at the CBNUO. Our results show that variable stars can be detected using our algorithm even with observational data for which the field of view has changed. Our algorithm is useful to detect new variable stars and analyze them based on existing time-series data. The developed algorithm can play an important role as a recycling technique for used data

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时间序列观测数据中变星探测周期分析算法的发展

本研究的目的是开发一种周期分析算法，用于在电荷耦合器件(CCD)观测的时间序列数据中发现新的变星。我们使用的数据来自CBNUO的变星监测项目。选取20天以上的一些磁突变变量的R滤波数据，得到了较好的统计结果。使用世界坐标系统(WCS)工具对观测图像的旋转进行校正，并为分析区域内的恒星分配相同的id。将该算法应用于DO Dra、TT Ari、RXSJ1803和MU Cam的数据。在这些区域中，我们发现了13颗变星，其中5颗是以前没有报道过的新变星。我们的周期分析算法在不同视场的观测数据混合的情况下进行了测试，因为中国天文台的观测数据有2K CCD和4K CCD。我们的结果表明，即使在视场发生变化的观测数据下，我们的算法也可以检测到变星。该算法可用于发现新的变星并根据已有的时间序列数据进行分析。该算法可以作为一种旧数据的回收技术发挥重要作用

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来源期刊

Journal of Astronomy and Space Sciences ASTRONOMY & ASTROPHYSICS-

CiteScore

1.30

自引率

20.00%

发文量

审稿时长

12 weeks

期刊介绍： JASS aims for the promotion of global awareness and understanding of space science and related applications. Unlike other journals that focus either on space science or on space technologies, it intends to bridge the two communities of space science and technologies, by providing opportunities to exchange ideas and viewpoints in a single journal. Topics suitable for publication in JASS include researches in the following fields: space astronomy, solar physics, magnetospheric and ionospheric physics, cosmic ray, space weather, and planetary sciences; space instrumentation, satellite dynamics, geodesy, spacecraft control, and spacecraft navigation. However, the topics covered by JASS are not restricted to those mentioned above as the journal also encourages submission of research results in all other branches related to space science and technologies. Even though JASS was established on the heritage and achievements of the Korean space science community, it is now open to the worldwide community, while maintaining a high standard as a leading international journal. Hence, it solicits papers from the international community with a vision of global collaboration in the fields of space science and technologies.