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Yang Jing. A Double Colour Index Diagram for the 273 Brightest Infrared Sources in the CRL Catalogues[J]. Astronomical Techniques and Instruments, 1982, (1): 70-80.
Citation: Yang Jing. A Double Colour Index Diagram for the 273 Brightest Infrared Sources in the CRL Catalogues[J]. Astronomical Techniques and Instruments, 1982, (1): 70-80.
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A Double Colour Index Diagram for the 273 Brightest Infrared Sources in the CRL Catalogues

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  • A double colour index diagram for 273 bright. infrared sources with the photometric data in the 4μ, llμ and 20μ wave-bands listed in the CRL catalogue is presented in this paper. It is obviously shown in the diagram that the positions of the maser sources, the H Ⅱ regions and the galaxies appear in groups respectively.The characteristics of the sources are analysed according to the positions of the sources with respect the blackbody curve in the diagram.
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