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

作　　者：WANG Dong ZHANG Mei LI Hui ZHANG HongQi 

机构地区：[1]Key Laboratory of Solar Activity,National Astronomical Observatory,Chinese Academy of Sciences,Beijing 100012,China [2]Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210008,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2009年第11期1707-1712,共6页中国科学：物理学、力学、天文学（英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 40636031, 10778723, 10873038, and 10833007);the Important Directional Projects of Chinese Academy of Sciences (Grant No. KLCX2-YW-T04);the National Basic Research Program of China (GrantNo. 2006CB806301)

摘　　要：We have compared a set of co-temporal magnetograms obtained with the Solar Magnetic Field Tele-scope (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.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.

关 键 词：ATMOSPHERE magnetic fields magnetic fields 

分 类 号：P182.2[天文地球—天文学]