Possible Quasi-periodic Modulation in the z?=?1.1 Gamma-Ray Blazar PKS 0426–380
Zhang,Peng-fei1,2; Yan,Da-hai3,4,5; Liao,Neng-hui1; Zeng,Wei2; Wang,Jian-cheng3,4,5; Cao,Li-Jia2
Source PublicationThe Astrophysical Journal
AbstractAbstract We search for γ-ray and optical periodic modulations in distant flat-spectrum radio quasar (FSRQ) PKS 0426–380 (the redshift z?=?1.1). Using two techniques (i.e., the maximum likelihood optimization and the exposure-weighted aperture photometry), we obtain γ-ray light curves from Fermi-LAT Pass 8 data covering from 2008 August to 2016 December. We then analyze the light curves with the Lomb–Scargle periodogram and the weighted wavelet Z-transform. A γ-ray quasi-periodicity with a period of 3.35?±?0.68 yr is found at the significance level of . The optical–UV flux covering from 2005 August to 2013 April provided by the ASI Science Data Center is also analyzed, but no significant quasi-periodicity is found. It should be pointed out that the result of the optical–UV data could be tentative because of the incompleteness of the data. Further long-term multiwavelength monitoring of this FSRQ is needed to confirm its quasi-periodicity.
KeywordGalaxies: jets gamma rays: galaxies radiation mechanisms: non-thermal
WOS IDIOP:0004-637X-842-1-aa7465
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China
2.Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, China
3.Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China;
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, China
5.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
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Zhang,Peng-fei,Yan,Da-hai,Liao,Neng-hui,等. Possible Quasi-periodic Modulation in the z?=?1.1 Gamma-Ray Blazar PKS 0426–380[J]. The Astrophysical Journal,2017,842(1).
APA Zhang,Peng-fei,Yan,Da-hai,Liao,Neng-hui,Zeng,Wei,Wang,Jian-cheng,&Cao,Li-Jia.(2017).Possible Quasi-periodic Modulation in the z?=?1.1 Gamma-Ray Blazar PKS 0426–380.The Astrophysical Journal,842(1).
MLA Zhang,Peng-fei,et al."Possible Quasi-periodic Modulation in the z?=?1.1 Gamma-Ray Blazar PKS 0426–380".The Astrophysical Journal 842.1(2017).
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