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/

Zendy Plus

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

Zendy Tools

Zendy Open

The GeV observations by Fermi-LAT give us the opportunity to characterize thehigh-energy emission (100 MeV - 300 GeV) variability properties of the BL Lacobject S5 0716+714. In this study, we performed flux and spectral analysis ofmore than 3 year long (August 2008 to April 2012) Fermi-LAT data of the source.During this period, the source exhibits two different modes of flux variabilitywith characteristic timescales of ~75 and ~140 days, respectively. We alsonotice that the flux variations are characterized by a weak spectral hardening.The GeV spectrum of the source shows a clear deviation from a simple power law,and is better explained by a broken power law. Similar to other bright Fermiblazars, the break energy does not vary with the source flux during thedifferent activity states. We discuss several possible scenarios to explain theobserved spectral break.

S5 0716+714 : GeV variability study