In-flight Characteristics and Modelling of the Instrumental Background of EP/FXT
Juan Zhang, Yong Chen, Shumei Jia, Haisheng Zhao, WeiWei Cui, Tianxiang Chen, Juan Wang, Hao Wang, Jin Wang, Chengkui Li, Xiaofan Zhao, Ju Guan, Dawei Han, Jingjing Xu, Liming Song, Hua Feng, Shuangnan Zhang, Weimin Yuan
arXiv:2507.00510v2 Announce Type: replace
Abstract: The in-flight instrumental background of the Follow-up X-ray Telescope (FXT) onboard Einstein Probe (EP) mission is analysed in this work by utilizing observations collected during Performance Verification phase and subsequent dedicated filter wheel closed observations. The instrumental backgrounds of the two FXT modules are consistent with each other, with an average rate of $sim 4times10^{-2}$,counts/s/keV in the 0.5–10,keV band for each module. The background is nearly uniformly distributed across the detector area, with a minor increase ($arXiv:2507.00510v2 Announce Type: replace
Abstract: The in-flight instrumental background of the Follow-up X-ray Telescope (FXT) onboard Einstein Probe (EP) mission is analysed in this work by utilizing observations collected during Performance Verification phase and subsequent dedicated filter wheel closed observations. The instrumental backgrounds of the two FXT modules are consistent with each other, with an average rate of $sim 4times10^{-2}$,counts/s/keV in the 0.5–10,keV band for each module. The background is nearly uniformly distributed across the detector area, with a minor increase ($