Conveners
GeV to TeV
- Andy Strong
Gamma-ray astronomy currently has an unprecedented sensitivity with instruments covering 6 decades of energy from 100MeV to 100TeV. The surveying capability at complementary energies between Fermi and HAWC allows extensive coverage for transients and flares. Very extended emissions are also being revealed within our Galaxy from nearby pulsar wind nebulae and star-forming regions. Using...
H.E.S.S. highlights
The H.E.S.S. collaboration continues to run an array of meanwhile five Imaging Atmospheric Cherenkov Telescopes to observe the Southern sky in TeV gamma-rays. In this presentation, I will review recent highlight results obtained with H.E.S.S., including the corresponding multiwavelength perspective and future prospects.
VERITAS is one of the world’s most sensitive detectors of astrophysical VHE (E > 100 GeV) gamma rays, and nearly 5000 hours of observations have been targeted on active galactic nuclei (AGN) and other extragalactic objects. These studies of blazars, radio galaxies, and starburst galaxies have resulted in 37 detections, in most cases accompanied by contemporaneous, broadband observations, which...
VERITAS is a ground-based imaging atmospheric Cherenkov telescope array sensitive to very high energy (VHE, E > 100 GeV) gamma rays. VERITAS has detected VHE gamma-ray emission from nearly 60 astrophysical sources of varied source classes. One of the primary areas of research of VERITAS is the study of galactic particle accelerators, and among the classes of galactic objects investigated are...
The existence of the Intergalactic Magnetic Field (IGMF) in the voids of the Large Scale Structure provides a unique opportunity to infer the information about the evolution of the Universe in the early times. Currently, the most promising way to measure this field is through the IGMF-induced halos around the distant, gamma-ray loud AGNs. Among these 1ES 0229+200 remains the most suitable,...
Until today the supernova remnant (SNR) paradigm provides the most plausible hypothesis for the origin of galactic cosmic rays. In contrast to the acceleration process, the way how cosmic rays are released into the interstellar medium is not well understood yet, partially due to the lack of observational signatures. Such a signature could be provided by gamma-rays produced in the interaction...
The blazar S5 0716+714 underwent an impressive outburst in January 2015, being detected by many instruments spanning from radio to very high energy (VHE, E$>$ 100GeV). The multi-wavelength dataset collected made possible a deep study of the broadband Spectral Energy Distribution (SED), which typically in blazars is described by two components: the low-energy one, in case of S50716+714 peaked...
In the past decade, the H.E.S.S. (High Energy Stereoscopic System)
experiment has significantly contributed to the field of ground-based
gamma-ray astronomy. In particular, during the first phase of the
experiment from 2004 to 2013, the extra galactic observation program
led to the discovery of more than 20 sources of VHE gamma-rays. During
this observation program, some regions of the...
We present here the results of the analysis of the gamma-ray blazar, 1ES 1215+303, over a 10-year period, from 2008 to 2017, measured at high energies (HE; 200 MeV < E < 100 GeV) by the Fermi Large Area Telescope (LAT) and at very high energies (VHE; E > 100 GeV) by Fermi-LAT and VERITAS. This is the longest temporal study of this high-frequency-peaked BL Lac object at gamma-ray energies. The...
