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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
2017-06-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume842Issue:1Pages:5
Abstract

We search for gamma-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 gamma-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 gamma-ray quasi-periodicity with a period of 3.35 +/- 0.68 yr is found at the significance level of. 3.6 s. 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
DOI10.3847/1538-4357/aa7465
WOS KeywordBL LACERTAE OBJECTS ; LARGE-AREA TELESCOPE ; LAC OBJECTS ; PHYSICAL-PROPERTIES ; FERMI BLAZARS ; TIME-SERIES ; SPACED DATA ; OSCILLATIONS ; MODEL ; JETS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000402877900005
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/23028
Collection中国科学院紫金山天文台
Corresponding AuthorZhang, Peng-fei
Affiliation1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Yunnan Univ, Key Lab Astroparticle Phys Yunnan Prov, Kunming 650091, Peoples R China
3.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China
4.Chinese Acad Sci, Ctr Astron Mega Sci, 20A Datun Rd, Beijing 100012, Peoples R China
5.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Peng-fei,Yan, Da-hai,Liao, Neng-hui,et al. Possible Quasi-periodic Modulation in the z=1.1 Gamma-Ray Blazar PKS 0426-380[J]. ASTROPHYSICAL JOURNAL,2017,842(1):5.
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.ASTROPHYSICAL JOURNAL,842(1),5.
MLA Zhang, Peng-fei,et al."Possible Quasi-periodic Modulation in the z=1.1 Gamma-Ray Blazar PKS 0426-380".ASTROPHYSICAL JOURNAL 842.1(2017):5.
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