Intra-day optical multi-band quasi-simultaneous observation of BL Lacertae object S5 0716+714 from 2013 to 2016

被引：14

作者：

Zhang, Xiaoyuan ^{[1
]}

Wu, Jianghua ^{[1
]}

Meng, Nankun ^{[1
]}

机构：

[1] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2018年 / 478卷 / 03期

基金：

中国国家自然科学基金;

关键词：

galaxies: active; BL Lacertae objects: individual: S5 0716+714; galaxies: photometry; ACTIVE GALACTIC NUCLEI; HIGH TEMPORAL RESOLUTION; X-RAY-EMISSION; SPECTRAL EVOLUTION; MARKARIAN; 421; RAPID VARIABILITY; LIGHT CURVES; PKS; 2155-304; RADIO-QUIET; BLAZARS;

D O I：

10.1093/mnras/sty1468

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We performed quasi-simultaneous optical multi-band monitoring of the BL Lac object S5 0716+714 on seven nights from 2013 to 2016. Intra-day variability was found on all seven nights. The source was faintest on JD 245 6322 with 14.15 mag and brightest on JD 245 7437 with 12.51 mag in the R band. Themaximum intra-day variation that we observedwas 0.15 mag in the B band on JD 245 6322. Both bluer-when-brighter and achromatic spectral behaviours were observed on the intra-day timescale. On the longer-term scale, the object exhibited mild bluer-when-brighter behaviour between the B and R bands. We estimate the inter-band lags using two independent methods. The variation in the B band was observed to lag behind that in the I band by about 15 min on JD 245 7315. We compare this lag with one reported previously and discuss the origin of these lags.

引用

页码：3513 / 3524

页数：12