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Detection of an Orphan X-Ray Flare from a Blazar Candidate EP240709a with the Einstein Probe

文献类型：期刊论文

作者Liu, Mingjun2,3; Zhang, Yijia4; Wang, Yun5; Xue, Rui6; Buckley, David7,8,9; Howell, D. Andrew10,11; Jin, Chichuan2,3; Li, Wenxiong2; Monageng, Itumeleng7,8; Pan, Haiwu2,3
刊名ASTROPHYSICAL JOURNAL
出版日期2025-05-01
卷号984期号:1
ISSN号0004-637X
DOI10.3847/1538-4357/adc301
产权排序第26完成单位
文献子类Article
英文摘要Blazars are often observed to flare across multiple wavelengths. Orphan flares from blazars have only been detected a few times, providing an opportunity to understand the structure of the jet in the accreting system. We report a remarkable orphan X-ray flare from a blazar candidate EP240709a, detected by the Einstein Probe (EP) in July 2024. The multiband spectral properties and variability support EP240709a as a high-energy peaked BL Lacertae-type object. The flux in 0.5-10 keV increased by at least 28 times to the value of low state in 2020, with no significant flaring detected in other bands during the same period. EP240709a exhibits the harder-when-brighter tendency in the X-ray band during the orphan flare, while its infrared-optical spectra are featureless. We employ one-zone and two-zone leptonic synchrotron self-Compton models to perform the spectral energy distribution fitting. Detecting this rare orphan flare shows the potential of EP in discovering peculiar activities from AGN in high-cadence X-ray sky surveys.
学科主题天文学 ; 太阳与太阳系
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词NEURAL-NETWORK CLASSIFICATION ; LARGE-AREA TELESCOPE ; GAMMA-RAY ; PKS 2155-304 ; XMM-NEWTON ; RADIO ; VARIABILITY ; EMISSION ; ASTROPY ; PROJECT
资助项目Strategic Priority Program on Space Science of Chinese Academy of Sciences; Strategic Priority Program on Space Science of the Chinese Academy of Sciences[XDA15310000]; Strategic Priority Program on Space Science of the Chinese Academy of Sciences[XDA15052100]; CNES[XDB0550100]; CNES[XDB0550000]; Strategic Priority Research Program of the Chinese Academy of Sciences[12473016]; National Natural Science Foundation of China (NSFC)[2023YFA1607804]; National Natural Science Foundation of China (NSFC)[2022YFA1602902]; National Natural Science Foundation of China (NSFC)[2023YFA1608100]; National Key R&D Program of China[12203043]; NSFC; Chinese Academy of Sciences (CAS)[3220029]; ANID FONDECYT Postdoctoral program[YNWR-QNBJ-2020-116]; Yunnan Province Youth Top Talent Project; CAS Light of West China Program[2024ZB110]; Jiangsu Funding Program for Excellent Postdoctoral Talent[GZC20241916]; Postdoctoral Fellowship Program[2024M763531]; General Fund; China Postdoctoral Science Foundation[202310740002]; China Scholarship Council[12433005]; Chinese Virtual Observatory - NSFC[AIM23-0001]; Millennium Science Initiative
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001471681400001
出版者IOP Publishing Ltd
资助机构Strategic Priority Program on Space Science of Chinese Academy of Sciences ; Strategic Priority Program on Space Science of the Chinese Academy of Sciences[XDA15310000, XDA15052100] ; CNES[XDB0550100, XDB0550000] ; Strategic Priority Research Program of the Chinese Academy of Sciences[12473016] ; National Natural Science Foundation of China (NSFC)[2023YFA1607804, 2022YFA1602902, 2023YFA1608100] ; National Key R&D Program of China[12203043] ; NSFC ; Chinese Academy of Sciences (CAS)[3220029] ; ANID FONDECYT Postdoctoral program[YNWR-QNBJ-2020-116] ; Yunnan Province Youth Top Talent Project ; CAS Light of West China Program[2024ZB110] ; Jiangsu Funding Program for Excellent Postdoctoral Talent[GZC20241916] ; Postdoctoral Fellowship Program[2024M763531] ; General Fund ; China Postdoctoral Science Foundation[202310740002] ; China Scholarship Council[12433005] ; Chinese Virtual Observatory - NSFC[AIM23-0001] ; Millennium Science Initiative
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28278]  
专题星系类星体研究组
云南天文台_丽江天文观测站（南方基地）
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Adler Planetarium, 1300 S DuSable Lake Shore Drive, Chicago, IL 60605, USA;
2.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing 100101, People's Republic of China; mjliu@bao.ac.cn;
3.School of Astronomy and Space Science, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, People's Republic of China;
4.Department of Astronomy, Tsinghua University, Beijing 100084, People's Republic of China;
5.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210034, People's Republic of China;
6.Department of Physics, Zhejiang Normal University, Jinhua 321004, People's Republic of China;
7.South African Astronomical Observatory, Cape Town 7935, South Africa;
8.Department of Astronomy, University of Cape Town, Rondebosch 7701, South Africa;
9.Department of Physics, University of the Free State, Bloemfontein 9300, South Africa;
10.Las Cumbres Observatory, 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA;
推荐引用方式
GB/T 7714		 Liu, Mingjun,Zhang, Yijia,Wang, Yun,et al. Detection of an Orphan X-Ray Flare from a Blazar Candidate EP240709a with the Einstein Probe[J]. ASTROPHYSICAL JOURNAL,2025,984(1).
APA Liu, Mingjun.,Zhang, Yijia.,Wang, Yun.,Xue, Rui.,Buckley, David.,...&Zou, Hu.(2025).Detection of an Orphan X-Ray Flare from a Blazar Candidate EP240709a with the Einstein Probe.ASTROPHYSICAL JOURNAL,984(1).
MLA Liu, Mingjun,et al."Detection of an Orphan X-Ray Flare from a Blazar Candidate EP240709a with the Einstein Probe".ASTROPHYSICAL JOURNAL 984.1(2025).

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