Long Term X-Ray Spectral Variations of the Seyfert-1 Galaxy Mrk 279  

作　　者：K.Akhila Ranjeev Misra Savithri H.Ezhikode K.Jeena 

机构地区：[1]Department of Physics,Providence Women’s College,University of Calicut,Kerala 673009,India [2]Inter-University Centre for Astronomy and Astrophysics(IUCAA),PB No.4,Ganeshkhind,Pune 411007,India [3]Department of Physics and Electronics,CHRIST(Deemed to be University),Hosur Main Road,Bangalore 560029,India

出　　处：《Research in Astronomy and Astrophysics》2024年第6期307-314,共8页天文和天体物理学研究（英文版）

基　　金：financial support from ISRO(Sanction Order:No.DS_2B-13013(2)/11/2020-Section2);funded by the National Aeronautics and Space Administration。

摘　　要：We present the results from a long term X-ray analysis of Mrk 279 during the period 2018–2020.We use data from multiple missions–AstroSat,NuSTAR and XMM-Newton,for the purpose.The X-ray spectrum can be modeled as a double Comptonization along with the presence of neutral Fe Kαline emission,at all epochs.We determined the source’s X-ray flux and luminosity at these different epochs.We find significant variations in the source’s flux state.We also investigate the variations in the source’s spectral components during the observation period.We find that the photon index and hence the spectral shape follow the variations only over longer time periods.We probe the correlations between fluxes of different bands and their photon indices,and found no significant correlations between the parameters.

关 键 词：galaxies:Seyfert galaxies:individual(Mrk 335) X-rays:galaxies 

分 类 号：P15[天文地球—天文学]