Oral Presentation

Hard X-ray Imager (HXI) onboard ASO-S mission

Author(s): Zhe Zhang, Yang Su, Jian Wu, Dengyi Chen, Yan Zhang, Yiming Hu, Tao Ma, Mingsheng Cai, Yongqiang Zhang, Jianghua Guo, Yongyi Huang (Purple Mountain Observatory, CAS)

Presenter: Zhe Zhang (中国科学院紫金山天文台)

The Hard X-ray Imager (HXI) is one of the main scientific instruments onboard the first Chinese comprehensive solar dedicated satellite Advanced Space-based Solar Observatory (ASO-S, Chinese nickname Kuafu-1). HXI focuses on imaging the nonthermal radiations up to 200 keV from solar flare activities by the Fourier space modulation technique. Launched successfully on 9 October 2022, the status of HXI has been fully verified and adjusted carefully. The preliminary results show that the performance of the instrument exceeds previous expectations. Especially, the effective energy measurement range for imaging is better than 15 to 300 keV with good energy linearity. HXI has been transferred to the in-orbit observation up to now. Several flare events have been observed during the past months and the reconstructed images of some of them reveal Intricate and elaborate details. These details not only demonstrate the reliable imaging capabilities of HXI and the spatial resolution of 3.2 arcseconds but also suggest some interesting physics to be analyzed.