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Research on sky subtraction for LAMOST

Jianjun Chen

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Abstract

Based on SDSS,the sky subtraction process from two-dimensional spectroscopy of LAMOST was established.Version 1.0 of 2D spectrum data processing software was also completed,which was tested with simulated data.The result indicates that the process could basically meet the design requirement of LAMOST.Finally,a sky subtraction method was presented based on surface fitting sky spectrum,and the simulation results show that the method can improve the precision of sky subtraction because of spatial variations in the sky background.

About this research paper

What this paper is about

Based on SDSS,the sky subtraction process from two-dimensional spectroscopy of LAMOST was established.Version 1.0 of 2D spectrum data processing software was also completed,which was tested with simulated data.The result indicates that the process could basically meet the design requirement of LAMOST.Finally,a sky subtraction method was presented based on surface fitting sky spectrum,and the simulation results show that the method can improve the precision of sky subtraction because of spatial variations in the sky background.

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Available abstract

Based on SDSS,the sky subtraction process from two-dimensional spectroscopy of LAMOST was established.Version 1.0 of 2D spectrum data processing software was also completed,which was tested with simulated data.The result indicates that the process could basically meet the design requirement of LAMOST.Finally,a sky subtraction method was presented based on surface fitting sky spectrum,and the simulation results show that the method can improve the precision of sky subtraction because of spatial variations in the sky background.

Key concepts: LAMOST, Sky, Subtraction, Background subtraction, Computer science, Software, Process (computing), Remote sensing

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