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题名: Revisiting Quasi-periodic Modulation in gamma- Ray Blazar PKS 2155-304 with Fermi Pass 8 Data
作者: Zhang, Peng-fei; Yan, Da-hai; Liao, Neng-hui; Wang, Jian-cheng
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2017
卷号: 835, 期号:2, 页码:260-
英文摘要: We examine the gamma-ray quasi-periodic variability of PKS 2155-304 with the latest publicly available Fermi-LAT Pass 8 data, which covers the years from 2008 August to 2016 October. We produce the light curves in two ways: the exposure-weighted aperture photometry and the maximum likelihood optimization. The light curves are then analyzed by using Lomb-Scargle Periodogram (LSP) and Weighted Wavelet Z-transform, and the results reveal a significant quasi-periodicity with a period of 1.74. +/- 0.13 years and a significance of similar to 4.9 sigma. The constraint of multifrequencies quasi-periodic variabilities on blazar emission model is discussed.
语种: 英语
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/17331
Appears in Collections:暗物质和空间天文实验室_期刊论文

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