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XMM-Newton Resolves Parsec-scale X-ray Jets in the PeVatron Microquasar V4641 Sgr
Naomi Tsuji, Caterina Tresoldi, Kaya Mori +34
The microquasar V4641 Sagittarii (V4641 Sgr) has recently been established as one of the most powerful Galactic PeV cosmic-ray accelerators (PeVatrons) through the detection of deg…
INTEGRAL/ISGRI post 2024-periastron view of PSR B1259-63
A. Kuzin, D. Malyshev, M. Chernyakova +2
PSR B1259-63/LS 2883 is a well-studied gamma-ray binary hosting a pulsar in a 3.4-year eccentric orbit around a Be-type star. Its non-thermal emission spans from radio to TeV energ…
Discovery of a bimodal luminosity distribution in persistent Be/X-ray pulsar 2RXP J130159.6-635806
Alexander Salganik, Sergey S. Tsygankov, Maria Chernyakova +2
We present a comprehensive analysis of 2RXP J130159.6-635806, a persistent low-luminosity Be/X-ray pulsar, focusing on its transition to a spin equilibrium state and the discovery…
Search of extended emission from HESS J1702-420 with eROSITA
Denys Malyshev, Maria Chernyakova, Felix Aharonian +1
HESS J1702-420 is a peculiar TeV complex with a morphology changing from a diffuse (HESS J1702-420B source) at TeV to point-like (HESS J1702-420A) at TeV…
Two models for the orbital modulation of -rays in Cyg X-3
Anton Dmytriiev, Andrzej A. Zdziarski, Denys Malyshev +2
We model the currently available -ray data from the Fermi Large Area Telescope on Cyg X-3. Thanks to its very strong -ray activity during 2018--2021, the data quality has sig…
Chasing Gravitational Waves with the Cherenkov Telescope Array
Jarred Gershon Green, Alessandro Carosi, Lara Nava +563
The detection of gravitational waves from a binary neutron star merger by Advanced LIGO and Advanced Virgo (GW170817), along with the discovery of the electromagnetic counterparts…
Variability studies of active galactic nuclei from the long-term monitoring program with the Cherenkov Telescope Array
Guillaume Grolleron, Josefa Becerra González, Jonathan Biteau +13
Blazars are active galactic nuclei (AGN) with a relativistic jet oriented toward the observer. This jet is composed of accelerated particles which can display emission over the ent…
Dark matter searches in dwarf spheroidal galaxies with the Cherenkov Telescope Array
Francesco Gabriele Saturni, Michele Doro, Aldo Morselli +1
Dark matter (DM) is one of the major components in the Universe. However, at present its existence is still only inferred through indirect astronomical observations. DM particles c…
The radio to GeV picture of PSR B1259-63 during the 2021 periastron passage
M. Chernyakova, D. Malyshev, B. van Soelen +3
PSR B1259-63 is a gamma-ray binary system with a radio pulsar orbiting an O9.5Ve star, LS 2883, with a period of ~3.4 yr. Close to the periastron the system is detected at all wave…
On the nature of the energy-dependent morphology of the composite multi-TeV gamma-ray source HESS J1702-420
Felix Aharonian, Denys Malyshev, Maria Chernyakova
HESS J1702-420 is a multi-TeV gamma-ray source with an unusual energy-dependent morphology. The recent H.E.S.S. observations suggest that the emission is well described by a combin…
Energy-dependent periodicities of LS I +61 303 in the GeV band
M. Chernyakova, D. Malyshev, A. Neronov +1
LS I +61303 is a rare representative of the gamma-ray binaries with a compact object known to be a pulsar. We report on the periodicity and spectral analysis of this source…
Improved binary solution for the gamma-ray binary 1FGL J1018.6-5856
B. van Soelen, S. Mc Keague, D. Malyshev +4
The gamma-ray binary 1FGL J1018.6-5856 consists of an O6V((f)) type star and an unknown compact object, and shows orbitally modulated emission from radio to very high energy gamma…
Prospects for Galactic transient sources detection with the Cherenkov Telescope Array
A. López-Oramas, A. Bulgarelli, S. Chaty +17
Several types of Galactic sources, like magnetars, microquasars, novae or pulsar wind nebulae flares, display transient emission in the X-ray band. Some of these sources have also…
Multi-wavelength properties of the 2021 periastron passage of PSR B1259-63
Maria Chernyakova, Denys Malyshev, Brian van Soelen +9
PSR B1259-63 is a gamma-ray binary system hosting a radio pulsar orbiting around a O9.5Ve star, LS 2883, with a period of ~3.4 years. The interaction of the pulsar wind with the LS…
New insight into the origin of the GeV flare in the binary system PSR B1259-63 from the 2017 periastron passage
M. Chernyakova, D. Malyshev, S. Mc Keague +4
PSR B1259-63 is a gamma-ray binary system hosting a radio pulsar orbiting around a O9.5Ve star, LS 2883, with a period of ~3.4 years. The interaction of the pulsar wind with the LS…
Gamma-ray binaries
Maria Chernyakova, Denys Malyshev
Gamma-ray binaries are a subclass of high-mass binary systems whose energy spectrum peaks at high energies (E100 MeV) and extends to very high energies (E100 GeV)…
Multi-wavelength observations of PSRJ 2032+4127 during the 2017 periastron passage
Maria Chernyakova, Denys Malyshev, Pere Blay +2
PSRJ 2032+4127 is only the second known gamma-ray binary where it is confirmed that a young radio pulsar is in orbit around a Be-star. The interaction of the pulsar wind with the m…
Detection of polarized gamma-ray emission from the Crab nebula with Hitomi Soft Gamma-ray Detector
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +191
We present the results from the Hitomi Soft Gamma-ray Detector (SGD) observation of the Crab nebula. The main part of SGD is a Compton camera, which in addition to being a spectrom…
A comprehensive study of high-energy gamma-ray and radio emission from Cyg X-3
Andrzej A. Zdziarski, Denys Malyshev, Guillaume Dubus +6
We study high-energy -rays observed from Cyg X-3 by the Fermi Large Area Telescope and the 15-GHz emission observed by the Ryle Telescope and the Arcminute Microkelvin Imager. W…
Hitomi X-ray Observation of the Pulsar Wind Nebula G21.50.9
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +194
We present results from the Hitomi X-ray observation of a young composite-type supernova remnant (SNR) G21.50.9, whose emission is dominated by the pulsar wind nebula (PWN) cont…
Temperature Structure in the Perseus Cluster Core Observed with Hitomi
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +192
The present paper investigates the temperature structure of the X-ray emitting plasma in the core of the Perseus cluster using the 1.8--20.0 keV data obtained with the Soft X-ray S…
Atomic data and spectral modeling constraints from high-resolution X-ray observations of the Perseus cluster with Hitomi
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +192
The Hitomi SXS spectrum of the Perseus cluster, with 5 eV resolution in the 2-9 keV band, offers an unprecedented benchmark of the atomic modeling and database for hot collis…
Glimpses of the past activity of Sgr A* inferred from X-ray echoes in Sgr C
Dimitri Chuard, Régis Terrier, Andrea Goldwurm +6
For a decade now, evidence has accumulated that giant molecular clouds located within the central molecular zone of our Galaxy reflect X-rays coming from past outbursts of the supe…
Hitomi Observations of the LMC SNR N132D: Highly Redshifted X-ray Emission from Iron Ejecta
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +191
We present Hitomi observations of N132D, a young, X-ray bright, O-rich core-collapse supernova remnant in the Large Magellanic Cloud (LMC). Despite a very short observation of only…