Invited Review

• An earlier explosion date for the Crab Nebula supernova

  Helmut A. Abt, John W. Fountain

  

  37

Research Paper

• A model of Saturn inferred from its measured gravitational field

  Dali Kong, Keke Zhang, Gerald Schubert, John Anderson

  

  38

• The effect of the equatorially symmetric zonal winds of Saturn on its gravitational field

  Dali Kong, Keke Zhang, Gerald Schubert, John D. Anderson

  

  39

• Flux and spectral variation characteristics of 3C 454.3 at the GeV band

  Hai-Ming Zhang, Jin Zhang, Rui-Jing Lu, Ting-Feng Yi, Xiao-Li Huang, En-Wei Liang

  

  40

• Statistical improvement in detection level of gravitational microlensing events from their light curves

  Ichsan Ibrahim, Hakim L. Malasan, Chatief Kunjaya, Anton Timur Jaelani, Gerhana Puannandra Putri, Mitra Djamal

  

  41

• Method of composing two-dimensional scanned spectra observed by the New Vacuum Solar Telescope

  Yun-Fang Cai, Zhi Xu, Yu-Chao Chen, Jun Xu, Zheng-Gang Li, Yu Fu, Kai-Fan Ji

  

  42

• GRB 170817A: a short GRB seen off-axis

  Xin-Bo He, Pak-Hin Thomas Tam, Rong-Feng Shen

  

  43

• A Q-band two-beam cryogenic receiver for the Tianma Radio Telescope

  Wei-Ye Zhong, Jian Dong, Wei Gou, Lin-Feng Yu, Jin-Qing Wang, Bo Xia, Wu Jiang, Cong Liu, Hui Zhang, Jun Shi, Xiao-Xing Yin, Sheng-Cai Shi, Qing-Hui Liu, Zhi-Qiang Shen

  

  44

• Numerical studies of the Kelvin-Hemholtz instability in a coronal jet

  Tian-Le Zhao, Lei Ni, Jun Lin, Udo Ziegler

  

  45

• Observations and light curve solutions of a selection of middle-contact W UMa binaries

  Diana Petrova Kjurkchieva, Velimir Angelov Popov, Doroteya Lyubenova Vasileva, Nikola Ivanov Petrov

  

  46

• Period variations of Algol-type eclipsing binaries AD And, TW Cas and IV Cas

  Štefan Parimucha, Pavol Gajdoš, Viktor Kudak, Miroslav Fedueco, Martin Vaňko

  

  47

• EMC design for actuators in the FAST reflector

  Hai-Yan Zhang, Ming-Chang Wu, You-Ling Yue, Heng-Qian Gan, Hao Hu, Shi-Jie Huang

  

  48