SIMBAD references

In optical observations of moving targets, field stars can be trailed when the telescope tracks at the speed of the targets. When these trailed sources are relatively long, faint, or distorted, the popular source extraction techniques, such as thresholding and profile fitting, tend to fail. We present a new source extraction strategy based on the template-matching method. We described the pipeline of template matching in detail and tested its performance compared with thresholding on 9 x 4320 synthetic images and 349 real images. The indicators, including recall, position extraction error, and flux extraction error, are analysed and given. The results show that template matching can obtain higher recalls and smaller position and flux extraction errors for trailed sources.