Abstract
ABSTRACTA new method of detecting cosmic-ray hits from single spectroscopic CCD images is proposed in this paper. First, one-order difference operations in two directions respectively are calculated to detect the candidate points of the cosmic-ray hits by using two thresholds. Second, Bessel curve fitting is adopted to calculate the deviations of the candidate points so as to find the confirmation points of cosmic-ray hits. At the end of this paper, five groups of simulation data and one group of observation data from SDSS are used to demonstrate the effectiveness of the proposed method.
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