English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present the result of near-infrared and optical observations of the BL Lacobject S5 0716$ + $714 carried out by the KANATA telescope. S5 0716$ + $714 hasboth a long term high-amplitude variability and a short-term variability withina night. The shortest variability (microvariability) time-scale is importantfor understanding the geometry of jets and magnetic field, because it providesa possible minimum size of variation sources. Here, we report the detection of15-min variability in S5 0716$ + $714, which is one of the shortest time-scalesin optical and near-infrared variations observed in blazars. The detectedmicrovariation had an amplitude of $0.061{\pm}0.005$ mag in $V$ band and a bluecolor of $\Delta(V-J)=-0.025{\pm}0.011$. Furthermore, we successfully detectedan unprecedented, short time-scale polarimetric variation which correlated withthe brightness change. We revealed that the microvariation had a specificpolarization component. The polarization degree of the variation component washigher than that of the total flux. These results suggest that themicrovariability originated from a small and local region where the magneticfield is aligned.

Detection of Polarimetric Variations Associated with the Shortest Time-Scale Variability in S5 0716$ + $714