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Title: Revisiting Quasi-periodic Modulation in γ -Ray Blazar PKS 2155-304 with Fermi Pass 8 Data

Abstract

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 ∼4.9 σ . The constraint of multifrequencies quasi-periodic variabilities on blazar emission model is discussed.

Authors:
;  [1]; ;  [2]
  1. Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008 (China)
  2. Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 (China)
Publication Date:
OSTI Identifier:
22663926
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 835; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; APERTURES; BL LACERTAE OBJECTS; COSMIC GAMMA SOURCES; EMISSION; GALAXIES; LIMITING VALUES; MODULATION; PERIODICITY; PHOTOMETRY; VISIBLE RADIATION

Citation Formats

Zhang, Peng-fei, Liao, Neng-hui, Yan, Da-hai, and Wang, Jian-cheng, E-mail: zhangpengfee@pmo.ac.cn, E-mail: yandahai@ynao.ac.cn. Revisiting Quasi-periodic Modulation in γ -Ray Blazar PKS 2155-304 with Fermi Pass 8 Data. United States: N. p., 2017. Web. doi:10.3847/1538-4357/835/2/260.
Zhang, Peng-fei, Liao, Neng-hui, Yan, Da-hai, & Wang, Jian-cheng, E-mail: zhangpengfee@pmo.ac.cn, E-mail: yandahai@ynao.ac.cn. Revisiting Quasi-periodic Modulation in γ -Ray Blazar PKS 2155-304 with Fermi Pass 8 Data. United States. doi:10.3847/1538-4357/835/2/260.
Zhang, Peng-fei, Liao, Neng-hui, Yan, Da-hai, and Wang, Jian-cheng, E-mail: zhangpengfee@pmo.ac.cn, E-mail: yandahai@ynao.ac.cn. Wed . "Revisiting Quasi-periodic Modulation in γ -Ray Blazar PKS 2155-304 with Fermi Pass 8 Data". United States. doi:10.3847/1538-4357/835/2/260.
@article{osti_22663926,
title = {Revisiting Quasi-periodic Modulation in γ -Ray Blazar PKS 2155-304 with Fermi Pass 8 Data},
author = {Zhang, Peng-fei and Liao, Neng-hui and Yan, Da-hai and Wang, Jian-cheng, E-mail: zhangpengfee@pmo.ac.cn, E-mail: yandahai@ynao.ac.cn},
abstractNote = {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 ∼4.9 σ . The constraint of multifrequencies quasi-periodic variabilities on blazar emission model is discussed.},
doi = {10.3847/1538-4357/835/2/260},
journal = {Astrophysical Journal},
number = 2,
volume = 835,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}