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Distribution of PSF of Near Earth Object Survey Telescope
Li Bin ; Zhao Haibin
Source PublicationActa Astronomica Sinica
AbstractThe field of view of CCD in NEOST(Near Earth Object Survey Telescope)is 1.94°*1.94°.As a wide-field telescope,the focusing according to single stars leads to uneven distribution of PSF(Point Spread Function)due to the field curvature.The contour map of PSFs FWHM(Full Width at Half Maximum)indicates the features of the distribution of PSF.The focal surface is yielded by fitting the relation between defocus and PSFs FWHM. It is confirmed that the focal surface reshaped by the field lens is not flat but convex,and the distance from the peak to the valley is about(855)mum.The center of the distribution of PSF deviates from the CCD center.This phenomenon is considered to be caused by the inclination of CCD.The method of getting the best-focus can be found by using the histogram of PSFs FWHM.
Subject AreaAstronomy & Astrophysics
Document Type期刊论文
Recommended Citation
GB/T 7714
Li Bin,Zhao Haibin. Distribution of PSF of Near Earth Object Survey Telescope[J]. Acta Astronomica Sinica,2012,53(3):240-248.
APA Li Bin,&Zhao Haibin.(2012).Distribution of PSF of Near Earth Object Survey Telescope.Acta Astronomica Sinica,53(3),240-248.
MLA Li Bin,et al."Distribution of PSF of Near Earth Object Survey Telescope".Acta Astronomica Sinica 53.3(2012):240-248.
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