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Constant cyclotron line energy in Hercules X-1 -- Joint Insight-HXMT and NuSTAR observations

Authors :
Xiao, G. C.
Ji, L.
Staubert, R.
Ge, M. Y.
Zhang, S.
Zhang, S. N.
Santangelo, A.
Ducci, L.
Liao, J. Y.
Guo, C. C.
Li, X. B.
Zhang, W.
Qu, J. L.
Lu, F. J.
Li, T. P.
Song, L. M.
Xu, Y. P.
Bu, Q. C.
Cai, C.
Cao, X. L.
Chang, Z.
Chen, G.
Chen, L.
Chen, T. X.
Chen, Y. B.
Chen, Y.
Chen, Y. P.
Cui, W.
Cui, W. W.
Deng, J. K.
Dong, Y. W.
Du, Y. Y.
Fu, M. X.
Gao, G. H.
Gao, H.
Gao, M.
Gu, Y. D.
Guan, J.
Gungor, C.
Han, D. W.
Huang, Y.
Huo, J.
Jia, S. M.
Jiang, L. H.
Jiang, W. C.
Jin, J.
Kong, L. D.
Li, B.
Li, C. K.
Li, G.
Li, M. S.
Li, W.
Li, X.
Li, X. F.
Li, Y. G.
Li, Z. W.
Liang, X. H.
Liu, C. Z.
Liu, G. Q.
Liu, H. W.
Liu, X. J.
Liu, Y. N.
Lu, B.
Lu, X. F.
Luo, Q.
Luo, T.
Ma, X.
Meng, B.
Nang, Y.
Nie, J. Y.
Ou, G.
Sai, N.
Song, S. X.
Sun, L.
Tan, Y.
Tao, L.
Tuo, Y. L.
Wang, C.
Wang, G. F.
Wang, J.
Wang, W. S.
Wang, Y. S.
Wen, X. Y.
Wu, B. B.
Wu, B. Y.
Wu, M.
Xiong, S. L.
Yang, J. W.
Yang, S.
Yang, Y. J.
Yin, Q. B.
Yin, Q. Q.
Zhang, A. M.
Zhang, C. M.
Zhang, F.
Zhang, H. M.
Zhang, J.
Zhang, T.
Zhang, W. C.
Zhang, W. Z.
Zhang, Y.
Zhang, Y. F.
Zhang, Y. J.
Zhang, Z.
Zhang, Z. L.
Zhao, H. S.
Zhao, X. F.
Zheng, S. J.
Zhou, J. F.
Zhu, Y.
Zhu, Y. X.
Publication Year :
2019

Abstract

The long-term evolution of the centroid energy of the CRSF in Her X-1 is still a mystery. We report a new measurement from a campaign between {\sl Insight}-HXMT and {\sl NuSTAR} performed in February 2018. Generally, the two satellites show well consistent results of timing and spectral properties. The joint spectral analysis confirms that the previously observed long decay phase has ended, and that the line energy instead keeps constant around 37.5 keV after flux correction.

Subjects

Subjects :
Astrophysics - High Energy Astrophysical Phenomena

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.1910.02393
Document Type :
Working Paper

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