摘要
本文介绍南京大学太阳塔的ＣＣＤ成像光谱观测系统的结构、工作方式，给出了该系统的一些性能测试结果．作为应用该系统的实例，文中给出了根据该系统观测的二维光谱资料，经处理得到的一个Ｈａ耀斑在线心和不同偏带处单色像的变化过程、该耀斑的亮度场轮廓图和速度场轮廓图．
Since October 1992, an imaging spectral observational system has been established and operated successfully in the Solar Tower of Nanjing University. The system includes a multichannel spectrograph, CCD cameras, an image processor, a computer, and an advanced mechanical scanning device. The real time data of digitized bidimensional spectra in the Ha and CaIIK wavebands can be obtained automatically and simultaneously.The spectral resolution of the spectrograph is 130000. An image reducer is used to reduce the spectral image by a factor of 4.33. The CCD cameras are PULNIX TM-760 and TM-765 with 756(H)×581(V) pixeis respectively for Ha and CaIIK.The size of each pixel is 11μ×11μ. The image scale on the CCD is 0.732 per pixel along the direction of the slit of the spectrograph. The dispersion is 0.0422A/pixel for Ha and 0.0541/pixel for CaIIK.The automatic scan system makes the solar image move perpendicularly over the slit. Signals coming from CCD cameras are amplified and digitized to 8 bit data by the image processor. A microcomputer AST386 is used for data aquisition and scan controlling. A software, which gives various automatic observing program,has been developed. Only 10 seconds is needed to obtain a bidimensional spectrum in ～10A wavelength interval for an 1'×2' area on the solar disk.In this paper, the design and the features of this system are described. Some application examples are given.
出处
《天文学报》
CSCD
北大核心
1994年第2期176-184,T001,共10页
Acta Astronomica Sinica
基金
国家自然科学基金
教委博士点基金
关键词
太阳
光谱观测
成像光谱观测
Bidimensional solar spectrum
CCD data acquisition system
Solar monochromatic image
