20 research outputs found
MAGIC VHE Gamma-Ray Observations Of Binary Systems
There are several types of Galactic sources that can potentially accelerate
charged particles up to GeV and TeV energies. We present here the results of
our observations of the source class of gamma-ray binaries and the subclass of
binary systems known as novae with the MAGIC telescopes. Up to now novae were
only detected in the GeV range. This emission can be interpreted in terms of an
inverse Compton process of electrons accelerated in a shock. In this case it is
expected that protons in the same conditions can be accelerated to much higher
energies. Consequently they may produce a second component in the gamma-ray
spectrum at TeV energies.
The focus here lies on the four sources: nova V339 Del, SS433, LS I +61 303
and V404 Cygni. The binary system LS I +61 303 was observed in a long-term
monitoring campaign for 8 years. We show the newest results on our search for
superorbital variability, also in context with contemporaneous optical
observations. Furthermore, we present the observations of the only
super-critical accretion system known in our galaxy: SS433. Finally, the
results of the follow-up observations of the microquasar V404 Cygni during a
series of outbursts in the X-ray band and the ones of the nova V339 Del will be
discussed in these proceedings.Comment: Proceedings of the 35th International Cosmic Ray Conference (ICRC
2017), Bexco, Busan, Korea (arXiv:1708.05153
All-sky Medium Energy Gamma-ray Observatory: Exploring the Extreme Multimessenger Universe
The All-sky Medium Energy Gamma-ray Observatory (AMEGO) is a probe class
mission concept that will provide essential contributions to multimessenger
astrophysics in the late 2020s and beyond. AMEGO combines high sensitivity in
the 200 keV to 10 GeV energy range with a wide field of view, good spectral
resolution, and polarization sensitivity. Therefore, AMEGO is key in the study
of multimessenger astrophysical objects that have unique signatures in the
gamma-ray regime, such as neutron star mergers, supernovae, and flaring active
galactic nuclei. The order-of-magnitude improvement compared to previous MeV
missions also enables discoveries of a wide range of phenomena whose energy
output peaks in the relatively unexplored medium-energy gamma-ray band
MAGIC and H.E.S.S. detect VHE gamma rays from the blazar OT081 for the first time: a deep multiwavelength study
https://pos.sissa.it/395/815/pdfPublished versio