2.4米望远镜干涉条纹的去除及对测光的影响  

Removal of Interference Fringes in Images from the YNAO 2.4m Telescope and the Impacts on Photometry

作　　者：郑中杰[1,2,3] 彭青玉[1,3] 

机构地区：[1]暨南大学计算机科学系,广东广州510632 [2]广东石油化工学院实验教学部,广东茂名525000 [3]暨南大学天体测量,动力学与空间科学中法联合实验室,广东广州510632

出　　处：《天文研究与技术》2013年第4期416-419,共4页Astronomical Research & Technology

基　　金：国家自然科学基金(10973007;11273014)资助

摘　　要：使用云南天文台丽江观测站2.4 m望远镜云南暗弱天体光谱及成像仪(Yunnan Faint-Object Spectrograph and Camera,YFOSC)终端观测时,有时会产生明显的干涉条纹。采用空域栈中值滤波方法对I滤光片的观测图像进行干涉条纹的提取和剔除。进一步采用生长曲线的方法对比剔除干涉条纹前后的测光发现,剔除干涉条纹后暗星的测光精度有明显的改善。Interference fringes are obviously present in some CCD images obtained by on the 2.4m telescope at the Lijiang station of the Yunnan Observatory. This is especially taken with long-wavelength bandpasses, such as the Johnson I bandpass. As an experiment to fringes we created a ＂supersky＂ image by stacking a series of CCD images of the open cluster by the telescope in the I bandpass. After subtracted by the ＂supersky,＂ which contains the YFOSC camera the case for images remove interference NGC 2324 observed the pattern of the interference fringes, the observed CCD images of the cluster become greatly improved in quality, and the photometric precisions of faint stars in the images are about twice better than without the ＂supersky＂ subtraction.

关 键 词：干涉条纹 测光 精度 

分 类 号：P122[天文地球—天体测量]