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A -ray determination of the Universe's star-formation history
LAT Collaboration, M. Ajello, K. Helgason +4
The light emitted by all galaxies over the history of the Universe produces the extragalactic background light (EBL) at ultraviolet, optical, and infrared wavelengths. The EBL is a…
Unresolved Gamma-Ray Sky through its Angular Power Spectrum
M. Ackermann, M. Ajello, L. Baldini +107
The gamma-ray sky has been observed with unprecedented accuracy in the last decade by the Fermi large area telescope (LAT), allowing us to resolve and understand the high-energy Un…
VERITAS and Fermi-LAT observations of new HAWC sources
VERITAS Collaboration, A. U. Abeysekara, A. Archer +280
The HAWC (High Altitude Water Cherenkov) collaboration recently published their 2HWC catalog, listing 39 very high energy (VHE; >100~GeV) gamma-ray sources based on 507 days of obs…
Multi-messenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A
The IceCube, Fermi-LAT, MAGIC +13
Individual astrophysical sources previously detected in neutrinos are limited to the Sun and the supernova 1987A, whereas the origins of the diffuse flux of high-energy cosmic neut…
A Statistical Study to Determine the Origin of Long-Duration Gamma-ray Flares
Lisa M. Winter, Valerie Bernstein, Nicola Omodei +1
Two scenarios have been proposed to account for sustained \,MeV gamma-ray emission in solar flares: (1) prolonged particle acceleration/trapping involving large-scale magne…
Probing the Puzzle of Behind-the-Limb -ray Flares: Data-driven Simulations of Magnetic Connectivity and CME-driven Shock Evolution
Meng Jin, Vahe Petrosian, Wei Liu +8
Recent detections of high-energy -rays from behind-the-limb (BTL) solar flares by the \emph{Fermi -ray Space Telescope} pose a puzzle and challenge on the particle accelerati…