Intra-Day Simultaneous Optical Monitoring of S5 0716+714

Intra-Day Simultaneous Optical Monitoring of S5 0716+714

We present the results of simultaneous optical multi-color observations of BL Lac object 0716+714 in November 2014 and February 2016. The intra-day variability (IDV) varies from 0.04 to 0.3 mags. Both achromatic and bluer-when-brighter (BWB) color behaviors were detected. A probable quasi-periodic o...

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Bibliographic Details
Main Authors: Xiaoyuan Zhang, Jianghua Wu, Zhongyi Man
Format: Article
Language:English
Published: MDPI AG 2016-09-01
Series:Galaxies
Subjects:
galaxies: active
BL Lac Objects: individual: S5 0716+714
galaxies: photometry
Online Access:http://www.mdpi.com/2075-4434/4/3/25
Description
Summary:We present the results of simultaneous optical multi-color observations of BL Lac object 0716+714 in November 2014 and February 2016. The intra-day variability (IDV) varies from 0.04 to 0.3 mags. Both achromatic and bluer-when-brighter (BWB) color behaviors were detected. A probable quasi-periodic oscillation overlapping on a significant flare was also observed. We used the interpolated cross-correlation function to calculate time lags between light curves in different bands. Variations in the B and R lagging behind that in the I band were found, which corresponds with anti-clockwise loops on the color-magnitude diagrams.
ISSN:2075-4434

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