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Discovery of TeV -ray emission from the neighbourhood of the supernova remnant G24.7+0.6 by MAGIC
MAGIC Collaboration, V. A. Acciari, S. Ansoldi +151
SNR G24.7+0.6 is a 9.5 kyrs radio and -ray supernova remnant evolving in a dense medium. In the GeV regime, SNR G24.7+0.6 (3FHL\,J1834.1--0706e/FGES\,J1834.1--0706) shows a hard…
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…
Theoretically motivated search and detection of non-thermal pulsations from PSRs J1747-2958, J2021+3651, and J1826-1256
Jian Li, Diego F. Torres, Francesco Coti Zelati +3
Based on a theoretical selection of pulsars as candidates for detection at X-ray energies, we present an analysis of archival X-ray observations done with Chandra and XMM-Newton of…
Ultrahigh-Energy Cosmic Ray Composition from the Distribution of Arrival Directions
Rita C. dos Anjos, Jorge F. Soriano, Luis A. Anchordoqui +8
The sources of ultrahigh-energy cosmic rays (UHECRs) have been difficult to catch. It was recently pointed out that while sources of UHECR protons exhibit anisotropy patterns that…
Discovery and characterization of superefficiency in pulsar wind nebulae
Diego F. Torres, Tingting Lin
We numerically study the radiative properties of the reverberation phase of pulsar wind nebulae. Reverberation brings a significant evolution in a short period of time. We show tha…
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…
VHE observations of binary systems performed with the MAGIC telescopes
Alicia López-Oramas, Oscar Blanch, Emma de Oña Wilhelmi +11
The improvement on the Imaging Air Cherenkov Technique (IACT) led to the discovery of a new type of sources that can emit at very high energies: the gamma-ray binaries. Only six sy…
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…
The photo-disintegration of He on the cosmic microwave background is less severe than earlier thought
Jorge F. Soriano, Luis A. Anchordoqui, Diego F. Torres
We thoroughly study the photo-disintegration of He on the cosmic microwave background using the most recent cross-section data both from the inclusive measurement observing the…
Observations of one young and three middle-aged -ray pulsars with the Gran Telescopio Canarias
R. P. Mignani, V. Testa, N. Rea +4
We used the 10.4m Gran Telescopio Canarias to search for the optical counterparts to four isolated -ray pulsars, all detected in the X-rays by either \xmm\ or \chan\ but not yet…
Search for Spatial Extension in High-Latitude Sources Detected by the Fermi Large Area Telescope
LAT Collaboration, Jonathan Biteau
We present a search for spatial extension in high-latitude () sources in recent Fermi point source catalogs. The result is the Fermi High-Latitude Extended Sources Cat…
Observing and modeling the gamma-ray emission from pulsar/pulsar wind nebula complex PSR J0205+6449/3C 58
Jian Li, Diego F. Torres, Ting Ting Lin +4
We present the results of the analysis of 8 years of Fermi-LAT data of the pulsar/pulsar wind nebula complex PSR J0205+6449/3C 58. Using a contemporaneous ephemeris, we carried out…
Einstein@Home discovers a radio-quiet gamma-ray millisecond pulsar
C. J. Clark, H. J. Pletsch, J. Wu +18
Millisecond pulsars (MSPs) are old neutron stars that spin hundreds of times per second and appear to pulsate as their emission beams cross our line of sight. To date, radio pulsat…
Simultaneous broadband observations and high-resolution X-ray spectroscopy of the transitional millisecond pulsar PSR J1023+0038
F. Coti Zelati, S. Campana, V. Braito +4
We report on the first simultaneous XMM-Newton, NuSTAR and Swift observations of the transitional millisecond pulsar PSR J1023+0038 in the X-ray active state. Our multi-wavelength…
Order parameters for the high-energy spectra of pulsars
Diego F. Torres
From the hundreds of gamma-ray pulsars known, only a handful show non-thermal X-ray pulsations. Instead, nine objects pulse in non-thermal X-rays but lack counterparts at higher en…
Search for Gamma-Ray Emission from Local Primordial Black Holes with the Fermi Large Area Telescope
LAT Collaboration
Black holes with masses below approximately g are expected to emit gamma rays with energies above a few tens of MeV, which can be detected by the Fermi Large Area Telesco…