Optical monitoring and spectral analysis of the Seyfert galaxy NGC1275
Optical monitoring and spectral analysis of the Seyfert galaxy NGC1275
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塞弗特星系 NGC1275 的光学监测和光谱分析
DOI：
10.1007/s10509-015-2511-4
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Xiao H.B.
中科院分区：
文献类型：
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作者：
Yuan Y.H.;Fan J.H.;Pan H.J.;Peng Z.Y.;Liu Y.;Xiao H.B.
本文报道了2005年11月至2014年2月，上海天文台1.56 m望远镜对NGC1275的VRI光度观测结果。我们的观测结果表明，三个波段的最大变率为，和；时间尺度是和。我们利用VRI观测得到了光谱指数（），并研究了光谱指数（）与VRI通量密度（）之间的关系。我们的研究结果表明，在V波段，与之间存在明显的反相关，具有相关系数和机会概率；在R波段，与呈反相关；但在I波段，与和没有相关性。
In this paper, we present VRI photometric observations of NGC1275 obtained by using the 1.56 m telescope at Shanghai Observatory (ShAO), China, during the period of Nov. 2005 to Feb. 2014. Our observations show that the maximum variabilities at three bands are,and; and the time scales areand. We use the VRI observations to obtain optical spectral indices (), and investigate the relationship between spectral indices () and VRI flux densities (). Our results show that, at V band, there is a clear anti-correlation betweenand:, with a correlation coefficientand a chance probability; at R band, there is anti-correlation betweenand:with,; but there is no correlation at I band,, withand.