OPTICAL MONITORING OF TWO BRIGHTEST NEARBY QUASARS, PHL 1811 AND 3C 273
OPTICAL MONITORING OF TWO BRIGHTEST NEARBY QUASARS, PHL 1811 AND 3C 273
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DOI：
10.1088/0067-0049/213/2/26
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发表时间：
2014-07
期刊：
影响因子：
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通讯作者：
Junhui Fan;O. Kurtanidze;Yi Liu;G. Richter;R. Chanishvili;Yu-hai Yuan
中科院分区：
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作者：
Junhui Fan;O. Kurtanidze;Yi Liu;G. Richter;R. Chanishvili;Yu-hai Yuan
光变是活动星系核最易观测的特征之一，在考虑发射机制时，它是很重要的。本文报道了利用格鲁吉亚Abastumani天文台70 cm弯月形望远镜的ST-6照相机和Ap 6 E CCD照相机对附近两个最亮的类星体PHL 1811和3C 273进行的光学测光监测。PHL 1811是在2002年9月至2012年12月期间监测的，而3C 273是在1998年2月至2008年5月期间监测的。在我们的监测期间，这两个来源没有显示出任何显著的日内变异性。PHL 1811的最大检测变化为ΔR = 0.112 ± 0.010 mag，3C 273的最大检测变化为ΔB = 0.595 ± 0.099 mag，ΔV = 0.369 ± 0.028 mag，ΔR = 0.495 ± 0.076 mag，ΔI = 0.355 ± 0.009 mag。用周期分析方法对源的观测结果进行分析，得到PHL 1811在R光变曲线上的周期为p = 5.80 ± 1.12年，在R光变曲线上的周期为p = 21.10 ± 0.14，10.00 ± 0.14，7.30 ± 0.09，13.20 ± 0.09，2.10 ± 0.06，3C 273的年龄为0.68 ± 0.05年。
Variability is one of the most observable characteristics of active galactic nuclei, and it is important when considering the emission mechanism. In this paper, we report optical photometry monitoring of two nearby brightest quasars, PHL 1811 and 3C 273, using the ST-6 camera attached to the Newtonian focus and the Ap6E CCD camera attached to the primary focus of the 70 cm meniscus telescope at the Abastumani Observatory, Georgia. PHL 1811 was monitored during the period from 2002 September to 2012 December, while 3C 273 was monitored during the period from 1998 February to 2008 May. During our monitoring period, the two sources did not show any significant intra-day variability. The largest detected variations are ΔR = 0.112 ± 0.010 mag. for PHL 1811, ΔB = 0.595 ± 0.099 mag, ΔV = 0.369 ± 0.028 mag, ΔR = 0.495 ± 0.076 mag, and ΔI = 0.355 ± 0.009 mag for 3C 273. When the periodicity analysis methods are adopted for the observations of the sources, a period of p = 5.80 ± 1.12 yr is obtained for PHL 1811 in the R light curve in the present work, and periods of p = 21.10 ± 0.14, 10.00 ± 0.14, 7.30 ± 0.09, 13.20 ± 0.09, 2.10 ± 0.06, and 0.68 ± 0.05 yr are obtained for 3C 273 based on the data in the present work combined with historical works.