A comparison of co-temporal magnetograms obtained with the Huairou magnetograph and the Spectro-Polarimeter on board Hinode

被引:10
|
作者
Wang Dong [1 ]
Zhang Mei [1 ]
Li Hui [2 ]
Zhang HongQi [1 ]
机构
[1] Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
[2] Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
关键词
atmosphere; magnetic fields; VECTOR MAGNETIC-FIELDS; FLUX-DENSITY MAPS; CALIBRATION; ROTATION;
D O I
10.1007/s11433-009-0249-0
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have compared a set of co-temporal magnetograms obtained with the Solar Magnetic Field Telescope (SMFT) of the Huairou Solar Observing Station (HSOS) and with the Spectro-Polarimeter of the Solar Optical Telescope (SP/SOT) on board Hinode to check the linear calibrations of SMFT vector magnetograms. The comparison shows that the currently used calibration coefficients of the SMFT have under-estimated the flux density and that a center-to-limb variation of the calibration coefficients was not taken into account by previous calibrations.
引用
收藏
页码:1707 / 1712
页数:6
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