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Application of time-series analysis methods to a multiple-sector TESS observations: the case of the radio-loud blazar 3C 371

文献类型：期刊论文

作者Tripathi, Ashutosh2,3; Wiita, Paul J.4; Dingler, Ryne3; Smith, Krista Lynne3; Phillipson, R. A.5; Graham, Matthew J.1; Cui, Lang2,6,7
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2026
卷号545期号:2页码:staf1920
关键词black hole physics relativistic processes methods: data analysis (galaxies:) BL Lacertae objects: general galaxies: general
ISSN号0035-8711
DOI10.1093/mnras/staf1920
产权排序1
英文摘要We present various time series analysis methods to analyse multiple-sector observations of bright active galactic nucleus from the Transiting Exoplanet Survey Satellite (TESS) and examine whether issues such as gaps and noise in these data can be mitigated. We determine variability time-scales and search for quasi-periodicity using these methods and assess any differences. In this paper, we present an analysis of the approximate to 300-d TESS observation of a blazar 3C 371 using power spectrum density, structure-function, and weighted wavelet Z-transform approaches. To reduce the effect of gaps and noise, Continuous auto-regressive moving averages, Bartlett periodogram, and wavelet decomposition methods are used. We have also used recurrence analysis to account for the non-linearity present in the data and to quantify variability or periodicity as the recurrent state. Considering the entirety of the TESS observations, we derive the variability time-scale to be around 4.5 d. Sector-wise analysis found variability time-scales in the range of 3.0-7.0 d, values that are found to be consistent using different methods. When analysing multiple sectors together, significant variability, which could be quasi-periodic oscillations, of duration 3-6 d in individual segments, is detected. These may be attributed to the kink instabilities developed in the jet or the existence of mini-jets inside a jet undergoing precession. We find that these methods, when applied appropriately, can be used to study the variability in TESS data. The noise present in these TESS observations can be minimized using Bartlett's periodogram and wavelet decomposition to recover the real stochastic variability.
WOS关键词QUASI-PERIODIC OSCILLATIONS ; ACTIVE GALACTIC NUCLEI ; OPTICAL VARIABILITY PROPERTIES ; LONG-TERM VARIABILITY ; RED POWER SPECTRA ; LIGHT CURVES ; BL LACERTAE ; INTRADAY VARIABILITY ; RECURRENCE PLOTS ; RAY PERIODICITY
资助项目CAS[2021-XBQNXZ-005] ; Tianshan Talent Training Program[2023TSYCCX0099] ; Deep Space Exploration Observation and Research Station of Xinjiang[XJYWZ2303] ; National SKA Program of China[2022SKA0120102]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001638784600001
出版者OXFORD UNIV PRESS
资助机构CAS ; Tianshan Talent Training Program ; Deep Space Exploration Observation and Research Station of Xinjiang ; National SKA Program of China
源URL[http://ir.xao.ac.cn/handle/45760611-7/8413]  
专题星系宇宙学研究团组
通讯作者Tripathi, Ashutosh
作者单位1.CALTECH, 1200 E Calif Blvd, Pasadena, CA 91125 USA
2.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China
3.Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamental, College Stn, TX 77843 USA
4.Coll New Jersey, Dept Phys, 2000 Pennington Rd, Ewing, NJ 08628 USA
5.Villanova Univ, Dept Phys, Villanova, PA 19085 USA
6.State Key Lab Radio Astron & Technol, A20 Datun Rd, Beijing 100101, Peoples R China
7.Xinjiang Key Lab Radio Astrophys, 150 Sci 1 St, Urumqi 830011, Peoples R China
推荐引用方式
GB/T 7714		 Tripathi, Ashutosh,Wiita, Paul J.,Dingler, Ryne,et al. Application of time-series analysis methods to a multiple-sector TESS observations: the case of the radio-loud blazar 3C 371[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2026,545(2):staf1920.
APA Tripathi, Ashutosh.,Wiita, Paul J..,Dingler, Ryne.,Smith, Krista Lynne.,Phillipson, R. A..,...&Cui, Lang.(2026).Application of time-series analysis methods to a multiple-sector TESS observations: the case of the radio-loud blazar 3C 371.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,545(2),staf1920.
MLA Tripathi, Ashutosh,et al."Application of time-series analysis methods to a multiple-sector TESS observations: the case of the radio-loud blazar 3C 371".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 545.2(2026):staf1920.

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