Long-term Monitoring on Mrk 501 for Its VHE gamma Emission and a Flare in October 2011

YBJ Collaboration, B. Bartoli, P. Bernardini +101

As one of the brightest active blazars in both X-ray and very high energy $\gamma$-ray bands, Mrk 501 is very useful for physics associated with jets from AGNs. The ARGO-YBJ experiment…