Blazar短时标光变的孔径测光分析  

Analysis of the Aperture Photometry for Blazar

作　　者：洪禅伟[1] 周曙白[1] 陈洛恩[2] 

机构地区：[1]云南大学物理系,云南昆明650091 [2]玉溪师范学院物理系,云南玉溪653100

出　　处：《天文研究与技术》2008年第4期330-336,共7页Astronomical Research & Technology

基　　金：云南省科委项目基金(2007A026M;2006a0049m)资助

摘　　要：对IRAF软件包处理AGN观测数据中,测光孔径、背景环的内外径差、背景等参数选取对测光结果的影响进行了实测比较。结果表明孔径的选取对测光结果的影响较大,而背景环的内外径差参数的影响不大;对所处理的观测序列中,背景参数对测光结果没有影响。对Blazar短时标光变监测中由于比较星选择引起的修正因子Γ进行了讨论,并对在2007年3月观测的PKS1510-089和OJ248数据进行了计算和比较分析。In this paper, we studied the influence of the parameters in IRAF software package for differential photometry of blazar by using different values of the photometric aperture, background, and width of sky annulus. The results indicate that the selected values of aperture parameters affect the differential photometry greatly, but the values of the width of sky annulus affect little, and the background parameter has hardly any effect on the differential photometry. We also discussed a correction factor F, to account for the effect of incorrect choice of the standard stars used in the differential photometry on studying microvariability of blazer. We applied the correction to our analysis of the data of PKS1510-089 and OJ 248 observed in March 2007.

关 键 词：AGN 测光 

分 类 号：P157.7[天文地球—天文学]