Vol 19, No 10

The Richardson-Lucy deconvolution method to extract LAMOST 1D spectra

Min Li, Guang-Wei Li, Ke Lv, Fu-Qing Duan, Hasitieer Haerken, Yong-Heng Zhao


Abstract We use the Richardson-Lucy deconvolution algorithm to extract one-dimensional (1D) spectra from Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) spectrum images. Compared with other deconvolution algorithms, this algorithm is much faster. The application on a real LAMOST image illustrates that the 1D spectrum resulting from this method has a higher signal-to-noise ratio and resolution than those extracted by the LAMOST pipeline. Furthermore, our algorithm can effectively suppress the ringings that are often present in the 1D resulting spectra generated by other deconvolution methods.


Keywords instrumentation: spectrographs — methods: numerical — techniques: image processing — techniques: spectroscopic

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