Astrometrica与MaxIm DL在天体测量中的应用与技术研究  

Applications and Technology Research for Astrometrica and MaxIm DL in Astrometry

作　　者：郭碧峰 彭青玉[1,2] 林孚荣 Guo Bifeng;Peng Qingyu;Lin Furong(Department of Computer Science,Jinan University,Guangzhou 510632,China;Sino-French Joint Laboratory for Astrometry,Dynamics and Space Science,Jinan University,Guangzhou 510632,China)

机构地区：[1]暨南大学计算机科学系,广东广州510632 [2]暨南大学中法天体测量、动力学与空间科学联合实验室,广东广州510632

出　　处：《天文研究与技术》2021年第2期195-202,共8页Astronomical Research & Technology

基　　金：国家自然科学基金(11873026,11703008,11273014);国家自然科学天文联合基金(U1431227)资助.

摘　　要：为探究Astrometrica和MaxIm DL两个软件在天体测量中应用与处理的差异,从软件的总体情况、CCD图像的读写与变换、平场校正、参数设置、归算与堆叠等方面进行了详细的比较和研究。以中国科学院云南天文台1 m光学望远镜拍摄的M35星团的两组观测资料为例,探究了Astrometrica均值、中值和MaxIm DL均值、中值、标准差(Sigma Clip)、迭代标准差(SD Mask)6种图像堆叠方法的输出结果。对上述6种输出结果进行了数据归算,具体参考Gaia DR2星表,比较了6种堆叠方法星像的位置测量精度。研究发现,使用Astrometrica中值堆叠输出的图像在位置精度中存在异常。最后给出了两个软件在天体测量和巡天工作中配合使用的方法。In order to explore the difference of Astrometrica and MaxIm DL for application and CCD image processing in Astrometry,overall introduction,loading,saving and transforming CCD images,flat calibration,data reduction and stacking of the two suites of software are detailedly compared and technically researched in this paper.Taking the example of two sets of observations of M35 Cluster photographed by the 1 m optical telescope of Yunnan Observatories of Chinese Academy of Sciences,this paper explores the output results of the 6 stacking methods including Mean,Median of Astrometrica and Mean,Median,Sigma Clip and SD Mask of MaxIm DL.Referring to Gaia DR2 Catalog,this paper reduces the 6 output results above and compares their precision of the star images.In this paper,we find anomalies in the position accuracy of the output images using Astrometrica′s Median stacking.At the end of this paper,we put forward some methods of using the two suites software in combination for astrometry and survey.

关 键 词：天体测量软件技术研究 天体测量 CCD图像处理 Astrometrica MaxIm DL 

分 类 号：P129[天文地球—天体测量]