A New Serial-direction Trail Effect in CCD Images of the Lunar-based Ultraviolet Telescope

	A New Serial-direction Trail Effect in CCD Images of the Lunar-based Ultraviolet Telescope
	Wu, C.1,2 ; Deng, J. S.1,2 ; Guyonnet, A.3,4,5; Antilogus, P.3,4,5; Cao, L.1,2; Cai, H. B.1,2 ; Meng, X. M.1,2 ; Han, X. H.1,2 ; Qiu, Y. L.1,2; Wang, J.1,2
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
	2016-10-01
卷号	128 期号:968
关键词	techniques: image processing
英文摘要	Unexpected trails have been seen subsequent to relative bright sources in astronomical images taken with the CCD camera of the Lunar-based Ultraviolet Telescope (LUT) since its first light on the Moon's surface. The trails can only be found in the serial-direction of CCD readout, differing themselves from image trails of radiation-damaged space-borne CCDs, which usually appear in the parallel-readout direction. After analyzing the same trail defects following warm pixels (WPs) in dark frames, we found that the relative intensity profile of the LUT CCD trails can be expressed as an exponential function of the distance i (in number of pixels) of the trailing pixel to the original source (or WP), i.e., exp(alpha i + beta). The parameters alpha and beta seem to be independent of the CCD temperature, intensity of the source (or WP), and its position in the CCD frame. The main trail characteristics show evolution occurring at an increase rate of similar to(7.3 +/- 3.6) x 10(-4) in the first two operation years. The trails affect the consistency of the profiles of different brightness sources, which make smaller aperture photometry have larger extra systematic error. The astrometric uncertainty caused by the trails is too small to be acceptable based on LUT requirements for astrometry accuracy. Based on the empirical profile model, a correction method has been developed for LUT images that works well for restoring the fluxes of astronomical sources that are lost in trailing pixels.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	CHARGE-TRANSFER INEFFICIENCY ; HUBBLE-SPACE-TELESCOPE ; PIXEL-BASED CORRECTION ; ADVANCED CAMERA
收录类别	SCI
语种	英语
WOS记录号	WOS:000387113500015
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6860]
专题	国家天文台_空间科学研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Key Lab Space Astron & Technol, Natl Astron Observ, Beijing 100012, Peoples R China 3.CNRS IN2P3, LPNHE, 4 Pl Jussieu, F-75252 Paris 05, France 4.Univ Paris 06, 4 Pl Jussieu, F-75252 Paris 05, France 5.Univ Paris 07, 4 Pl Jussieu, F-75252 Paris 05, France
推荐引用方式 GB/T 7714	Wu, C.,Deng, J. S.,Guyonnet, A.,et al. A New Serial-direction Trail Effect in CCD Images of the Lunar-based Ultraviolet Telescope[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2016,128(968).
APA	Wu, C..,Deng, J. S..,Guyonnet, A..,Antilogus, P..,Cao, L..,...&Li, G. W..(2016).A New Serial-direction Trail Effect in CCD Images of the Lunar-based Ultraviolet Telescope.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,128(968).
MLA	Wu, C.,et al."A New Serial-direction Trail Effect in CCD Images of the Lunar-based Ultraviolet Telescope".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 128.968(2016).