Multiwavelength Temporal Variability of the Blazar PKS 1510–089

Author:

Yuan Q.ORCID,Kushwaha PankajORCID,Gupta Alok C.ORCID,Tripathi AshutoshORCID,Wiita Paul J.ORCID,Zhang M.ORCID,Liu X.ORCID,Lähteenmäki AnneORCID,Tornikoski MerjaORCID,Tammi JoniORCID,Ramakrishnan VenkatesshORCID,Cui L.ORCID,Wang X.ORCID,Gu M. F.ORCID,Bambi CosimoORCID,Volvach A. E.ORCID

Abstract

Abstract We perform correlation and periodicity search analyses on long-term multiband light curves of the flat-spectrum radio quasar PKS 1510−089 observed by the space-based Fermi-Large Area Telescope in γ-rays, the SMARTS and Steward Observatory telescopes in optical and near-infrared (NIR), and the 13.7 m radio telescope in Metsähovi Radio Observatory between 2008 and 2018. The z-transform discrete correlation function method is applied to study the correlation and possible time lags among these multiband light curves. Among all pairs of wavelengths, the γ-ray versus optical/NIR and optical versus NIR correlations show zero time lags; however, both the γ-ray and optical/NIR emissions precede the radio radiation. The generalized Lomb–Scargle periodogram, weighted wavelet z-transform, and REDFIT techniques are employed to investigate the unresolved core emission–dominated 37 GHz light curve and yield evidence for a quasi period around 1540 days, although given the length of the whole data set it cannot be claimed to be significant. We also investigate the optical/NIR color variability and find that this source shows a simple redder-when-brighter behavior over time, even in the low-flux state.

Funder

Regional Collaborative Innovation Project of Xinjiang Uyghur Autonomous Region

MOST ∣ National Natural Science Foundation of China

National Key R&D Intergovernmental Cooperation Program of China

CAS ‘Light of West China’ Program

Department of Science and Technology-INSPIRE Faculty grant

Chinese Academy of Sciences President’s International Fellowship Initiative

Innovation Program of the Shanghai Municipal Education Commission

Shanghai Pilot Program for Basic Research Chinese Academy of Science, Shanghai Branch

science research grants from the China Manned Space Project

Publisher

American Astronomical Society

Subject

Space and Planetary Science,Astronomy and Astrophysics

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3