Quasi-simultaneous multicolour optical variability of S5 0716+714
Quasi-simultaneous multicolour optical variability of S5 0716+714
复制标题
S5 0716 714 的准同时多色光学可变性
DOI：
10.1093/mnras/stu1373
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发表时间：
2014-10
影响因子：
4.8
通讯作者：
Li K.
中科院分区：
文献类型：
--
作者：
Hu Shao Ming;Chen X.;Guo D. F.;Jiang Y. G.;Li K.
为了研究耀变体的物理过程，于2009年2月至2014年2月在V，RandI波段对S50716 +714进行了准同步观测。共获得42个夜晚的6176个测光观测数据并进行了分析。采用F检验和方差分析检验方法检测83条夜内光变曲线的变异性，得出变异性占空比为83.9%。V-band和R-band的夜间变化幅度均略大于R-band，且随着源的减弱，V-band和R-band的夜间变化幅度都有逐渐增大的趋势。通过对线性拟合计算出的变率分布的分析，发现V-R波段的夜变增亮过程比衰减过程快。变化率的Kolmogorov-Smirnov检验表明，变异性是时间不对称的。准同时多色观测使我们能够获得2303 V − R色指数。通过相关性分析，得出了一个强大的蓝时亮的趋势intrinight的时间尺度和温和的蓝时亮的颜色变化的internight的时间尺度。变化特性支持内禀激波模型和几何效应，这表明多普勒因子的变化是由于相对论射流的视角的变化。
In order to investigate the physical process of blazar variability, S5 0716+714 was monitored quasi-simultaneously inV,RandIband from 2009 February to 2014 February. 6176 photometric observations on 42 nights were obtained and analysed. TheF-test and analysis of variance test methods were used to detect variability for 83 intranight light curves, and a variability duty cycle of 83.9 per cent was derived. The variability amplitude inVband was slightly larger than that inRband, and a mild trend of having larger variability amplitude when source is getting fainter was shown for the intranight variations in bothVandRbands. We found that the brightening phase of intranight variability was faster than fading process for bothVandRband by analysing the distribution of the variability change rates calculated by linear fitting. A Kolmogorov–Smirnov test of change rates showed that the variability was time asymmetric. Quasi-simultaneous multicolour observations enabled us to obtain 2303V−Rcolour indices. A strong bluer-when-brighter trend on intranight time-scales and a mild bluer-when-brighter colour variation on internight time-scales were derived by correlation analysis. The variability characteristics support the intrinsic shock-in-jet models and geometric effects, which indicates that the Doppler factor changes due to the change in the viewing angel of the relativistic jet.
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DOI：
10.1111/j.1365-2966.2011.20243.x
发表时间：
2011-12
影响因子：
4.8
作者：
H. Gaur;Alok C. Gupta;A. Strigachev;R. Bachev;E. Semkov;P. Wiita;S. Peneva;S. Boeva;N. Kacharov
通讯作者：
H. Gaur;Alok C. Gupta;A. Strigachev;R. Bachev;E. Semkov;P. Wiita;S. Peneva;S. Boeva;N. Kacharov
DOI：
10.1086/114634
发表时间：
1988
期刊：
The Astronomical Journal
影响因子：
--
作者：
S. Howell;A. Warnock;K. Mitchell
通讯作者：
S. Howell;A. Warnock;K. Mitchell
影响因子：
4.8
作者：
P. Padovani;P. Giommi
通讯作者：
P. Padovani;P. Giommi
BL 蝎子物体的七年多色光学监测 S5 0716 714
DOI：
10.1088/0067-0049/204/2/22
发表时间：
2012-12
期刊：
Astrophysical Journal, The - Supplement Series
影响因子：
--
作者：
Zhou, Xu;Ma, Jun;Yuan, Qirong;Wang, Lingzhi
通讯作者：
Wang, Lingzhi
影响因子：
6.5
作者：
M. Villata;C. Raiteri;V. Larionov;V. Larionov;V. Larionov;M. Nikolashvili;M. Aller;U. Bach;D. Ca
通讯作者：
M. Villata;C. Raiteri;V. Larionov;V. Larionov;V. Larionov;M. Nikolashvili;M. Aller;U. Bach;D. Ca