Multiwavelength observations of the blazar BL Lacertae: a new fast TeV $\gamma$-ray flare

Q. Feng, S. G. Jorstad, A. P. Marscher +11

Observations of fast TeV $\gamma$-ray flares from blazars reveal the extreme compactness of emitting regions in blazar jets. Combined with very-long-baseline radio interferometry measur…