arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.05160astro-ph.GA
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斯隆数字巡天混响测绘计划:光度学g和i光变曲线

The Sloan Digital Sky Survey Reverberation Mapping Project: Photometric g and i Light Curves

K. Kinemuchi, Patrick B. Hall, Ian McGreer, C. S. Kochanek, Catherine J. Grier, Jonathan Trump, Yue Shen, W. N. Brandt, W. M. Wood-Vasey, Xiaohui Fan, Bradley M… 展开作者

K. Kinemuchi, Patrick B. Hall, Ian McGreer, C. S. Kochanek, Catherine J. Grier, Jonathan Trump, Yue Shen, W. N. Brandt, W. M. Wood-Vasey, Xiaohui Fan, Bradley M. Peterson, Donald P. Schneider, Juan V. Hernandez Santisteban, Keith Horne, Yuguang Chen, Sarah Eftekharzadeh, Yucheng Guo, Siyao Jia, Feng Li, Zefeng Li, Jundan Nie, Kara A. Ponder, Jesse Rogerson, Tianmen Zhang, Hu Zou, Linhua Jiang, Luis C. Ho, Jean-Paul Kneib, Patrick Petitjean, Nathalie Palanque-Delabrouille, Christopher Yeche

摘要:

斯隆数字巡天混响映射(SDSS-RM)计划通过光谱和光度两种方法监测849个活动星系核(AGN)。在这项工作中使用的光度观测跨度超过四年,为这些物体的变异性研究提供了极好的基线。我们呈现了2014年至2017年由Steward天文台的Bok望远镜和CFHT望远镜与MegaCam获得的光度光变曲线。我们提供详细的数据采集和处理的数据从每个望远镜,用于产生光变曲线的差异成像测光,和计算的变化指数,以量化每个活动星系核的可变性。我们发现,Welch-Stetson J指数提供了一个有用的表征活动星系核的可变性,并可以用来选择活动星系核进行进一步的研究。

英文摘要:

The Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) program monitors 849 active galactic nuclei (AGN) both spectroscopically and photometrically. The photometric observations used in this work span over four years and provide an excellent baseline for variability studies of these objects. We present the photometric light curves from 2014 to 2017 obtained by the Steward Observatory's Bok telescope and the CFHT telescope with MegaCam. We provide details on the data acquisition and processing of the data from each telescope, the difference imaging photometry used to produce the light curves, and the calculation of a variability index to quantify each AGN's variability. We find that the Welch-Stetson J-index provides a useful characterization of AGN variability and can be used to select AGNs for further study.

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