Exploring the characteristics of the flare from PMN J0218–2307 by Fermi-LAT

作     者：Yun-Chuan Xiang Yu-Liang Xin Min Yuan Yun-Chuan Xiang;Yu-Liang Xin;Min Yuan

作者机构：Department of AstronomyYunnan Universityand Key Laboratory of Astroparticle Physics of Yunnan ProvinceKunming650091China School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031China 

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7期

页      面：17-22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：the support for this work from National Key R&D Program of China under grant No.2018YFA0404204 the National Natural Science Foundation of China(NSFC,U1931113,U1738211 and U193110119) the Foundations of Yunnan Province(2018IC059,2018FY001(-003)) the Scientific Research Fund of the Yunnan Education Department(2020Y0039) the China Postdoctoral Science Foundation funded project(2019M661971) 

主　　题：radiation mechanisms:non-thermal gamma rays:galaxies galaxies:active galaxies:individual(PMN J0218–2307) 

摘      要：PMN J0218-2307(4 FGL J0218.9-2305) is classified as a blazar candidate with unknown type(BCU) in the fourth source catalog from the Fermi Large Area Telescope(Fermi-LAT).With the updated Fermi-LAT Pass 8 data,the γ-ray flaring activity toward PMN J0218-2307 is *** test statistic(TS) value of PMN J0218-2307 in energy band of 100 MeV-500 GeV is 133.893 with a significance level of 10.96σ.The maximum-likelihood photon flux is(8.131 ± 1.359) × 10^(-9) ph cm^(-2) s^(-1).A significantγ-ray flare in the period from 2008 August 4 to 2019 August 25 is found from the *** spectral characteristics of GeV energy band of PMN J0218-2307 is similar to that of flat-spectrum radio quasars(FSRQs) in the local Universe.