The intra-day optical monitoring of BL Lacerate object 1ES 1218+304 at its highest X-ray flux level

作     者：Si-Si Sun Hua-Li Li Xing Yang Jing Lü Da-Wei Xu Jing Wang Si-Si Sun;Hua-Li Li;Xing Yang;Jing Lü;Da-Wei Xu;Jing Wang

作者机构：Guangxi Key Laboratory for Relativistic AstrophysicsSchool of Physical Science and TechnologyGuangxi UniversityNanning 530004China Key Laboratory of Space Astronomy and TechnologyNational Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space ScienceUniversity of Chinese Academy of SciencesBeijing 100101China 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2021年第21卷第8期

页      面：135-140页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：support from the National Key R & D Program of China (Grant No.2020YFE0202100) supported by the National Natural Science Foundation of China (Grant 11773036) by the Strategic Pioneer Program on Space Science,Chinese Academy of Sciences (Grant Nos.XDA15052600 and XDA15016500) supported by the Natural Science Foundation of Guangxi (2018GXUSFGA281007 & 2020GXNSFDA238018) by the Bagui Young Scholars Program 

主　　题：BL Lacertae objects:general BL Lacertae objects:individual(1ES1218+304) galaxies:active method:statistical 

摘      要：We here report a monitor of the BL Lac object 1 ES 1218+304 in both B-and R-bands by the GWAC-F60 A telescope in eight nights,when it was triggered to be at its highest X-ray flux in history by the VERITAS Observatory and Swift *** ANOVA and χ^(2)-test enable us to clearly reveal an intraday variability in optical wavelengths in seven out of the eight nights.A bluer-when-brighter chromatic relationship has been clearly identified in five out of the eight nights,which can be well explained by the shock-in-jet *** addition,a quasi-periodic oscillation phenomenon in both bands could be tentatively identified in the first night.A positive delay between the two bands has been revealed in three out of the eight nights,and a negative one in the other *** identified minimum time delay enables us to estimate the MBH=2.8 × 10^(7) M_(⊙) that is invalid.