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

被引：0
作者：
Zhang X. [1 ]
Wu J. [1 ]
Meng N. [1 ]
机构：
[1] Department of Astronomy, Beijing Normal University, Beijing
来源：
Wu, Jianghua (jhwu@bnu.edu.cn) | 2018年 / Oxford University Press卷 / 478期
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
BL Lacertae objects: individual: S5 0716+714; Galaxies: active; Galaxies: photometry;
D O I：
10.1093/MNRAS/STY1468
中图分类号：
学科分类号：
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. © 2018 The Author(s).
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页码：3513 / 3524
页数：11
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