Updated Multichannel Infrared Solar Spectrograph at Purple Mountain Observatory

We describe the newly updated multichannel infrared solar spectrograph at the Purple Mountain Observatory that now uses three Apogee AP7p grade 1 scientific CCDs as its detectors and works at three wavelengths, He I 10 830 A, Ca II 8542 A and H alpha , simultaneously. The spectral resolutions of the...

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Published inChinese physics letters Vol. 19; no. 5; pp. 742 - 744
Main Authors Hui, Li, Jian-Qi, You, Qin-Di, Wu, Xing-Feng, Yu
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.05.2002
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Summary:We describe the newly updated multichannel infrared solar spectrograph at the Purple Mountain Observatory that now uses three Apogee AP7p grade 1 scientific CCDs as its detectors and works at three wavelengths, He I 10 830 A, Ca II 8542 A and H alpha , simultaneously. The spectral resolutions of these lines are 0.047 7,0.051 13 and 0.054 53 A per pixel, respectively. Some observation examples are presented. The observed profiles of the three lines demonstrate that redshift and asymmetry exist in the impulsive phase of the given disc flare and both blueshift and redshift exist in the presented flare spray in the impulsive phase of a limb flare. They also indicate that horizontal expansion exists in addition to the quick radial motion in the flare spray.
Bibliography:ObjectType-Article-2
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/19/5/342