Chen, A.
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View article: Optimizing the potential of KM3NeT in detecting core-collapse supernovae
Optimizing the potential of KM3NeT in detecting core-collapse supernovae Open
Core-collapse supernovae mark the end of life of massive stars. However, despite their importance in astrophysics, their underlying mechanisms remain unclear. Neutrinos that emerge from the dense core of the star offer a promising way to s…
View article: Optimizing the potential of KM3NeT in detecting core-collapse supernovae
Optimizing the potential of KM3NeT in detecting core-collapse supernovae Open
Core-collapse supernovae mark the end of life of massive stars. However, despite their importance in astrophysics, their underlying mechanisms remain unclear. Neutrinos that emerge from the dense core of the star offer a promising way to s…
View article: Constraining the nature of the most extreme Galactic particle accelerator. H.E.S.S. observations of the microquasar V4641 Sgr
Constraining the nature of the most extreme Galactic particle accelerator. H.E.S.S. observations of the microquasar V4641 Sgr Open
Microquasars have emerged as promising candidates to explain the cosmic-ray flux at petaelectronvolt energies. LHAASO observations revealed V4641~Sgr as the most extreme example so far. Using $\approx$100~h of H.E.S.S. data, we performed a…
View article: Constraining the nature of the most extreme Galactic particle accelerator. H.E.S.S. observations of the microquasar V4641 Sgr
Constraining the nature of the most extreme Galactic particle accelerator. H.E.S.S. observations of the microquasar V4641 Sgr Open
Microquasars have emerged as promising candidates to explain the cosmic-ray flux at petaelectronvolt energies. LHAASO observations revealed V4641~Sgr as the most extreme example so far. Using $\approx$100~h of H.E.S.S. data, we performed a…
View article: Constraining the nature of the most extreme Galactic particle accelerator. H.E.S.S. observations of the microquasar V4641 Sgr
Constraining the nature of the most extreme Galactic particle accelerator. H.E.S.S. observations of the microquasar V4641 Sgr Open
Microquasars have emerged as promising candidates to explain the cosmic-ray flux at petaelectronvolt energies. LHAASO observations revealed V4641~Sgr as the most extreme example so far. Using $\approx$100~h of H.E.S.S. data, we performed a…
View article: Evidence of 100 TeV<i>γ</i>-ray emission from HESS J1702-420: A new PeVatron candidate
Evidence of 100 TeV<i>γ</i>-ray emission from HESS J1702-420: A new PeVatron candidate Open
Aims. The identification of PeVatrons, hadronic particle accelerators reaching the knee of the cosmic ray spectrum (few × 10 15 eV), is crucial to understand the origin of cosmic rays in the Galaxy. We provide an update on the unidentified…
View article: Measurements of branching fractions and asymmetry parameters of $$ {\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0} $$, $$ {\Xi}_c^0\to {\Sigma}^0{\overline{K}}^{\ast 0} $$, and $$ {\Xi}_c^0\to {\Sigma}^{+}{K}^{\ast -} $$ decays at Belle
Measurements of branching fractions and asymmetry parameters of $$ {\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0} $$, $$ {\Xi}_c^0\to {\Sigma}^0{\overline{K}}^{\ast 0} $$, and $$ {\Xi}_c^0\to {\Sigma}^{+}{K}^{\ast -} $$ decays at Belle Open
View article: H.E.S.S. and MAGIC observations of a sudden cessation of a very-high-energy<i>γ</i>-ray flare in PKS 1510−089 in May 2016
H.E.S.S. and MAGIC observations of a sudden cessation of a very-high-energy<i>γ</i>-ray flare in PKS 1510−089 in May 2016 Open
The flat spectrum radio quasar (FSRQ) PKS 1510−089 is known for its complex multiwavelength behaviour and it is one of only a few FSRQs detected in very-high-energy (VHE, E > 100 GeV) γ rays. The VHE γ -ray observations with H.E.S.S. and M…
View article: An extreme particle accelerator in the Galactic plane: HESS J1826−130
An extreme particle accelerator in the Galactic plane: HESS J1826−130 Open
The unidentified very-high-energy (VHE; E > 0.1 TeV) γ -ray source, HESS J1826−130, was discovered with the High Energy Stereoscopic System (HESS) in the Galactic plane. The analysis of 215 h of HESS data has revealed a steady γ -ray flux …
View article: Resolving acceleration to very high energies along the jet of Centaurus A
Resolving acceleration to very high energies along the jet of Centaurus A Open
View article: First search for the ηc2(1D) in B decays at Belle
First search for the ηc2(1D) in B decays at Belle Open
View article: Observation of a new structure near 10.75 GeV in the energy dependence of the e+e−→ ϒ (nS)π+π− (n = 1, 2, 3) cross sections
Observation of a new structure near 10.75 GeV in the energy dependence of the e+e−→ ϒ (nS)π+π− (n = 1, 2, 3) cross sections Open
A bstract We report a new measurement of the e + e − → ϒ( nS ) π + π − ( n = 1 , 2 , 3) cross sections at energies from 10 . 52 to 11 . 02 GeV using data collected with the Belle detector at the KEKB asymmetric-energy e + e − collider. We …
View article: Constraints on the emission region of 3C 279 during strong flares in 2014 and 2015 through VHE <i>γ</i>-ray observations with H.E.S.S.
Constraints on the emission region of 3C 279 during strong flares in 2014 and 2015 through VHE <i>γ</i>-ray observations with H.E.S.S. Open
The flat spectrum radio quasar 3C 279 is known to exhibit pronounced variability in the high-energy (100 MeV < E < 100 GeV) γ -ray band, which is continuously monitored with Fermi -LAT. During two periods of high activity in April 2014 and…
View article: Upper limits on very-high-energy gamma-ray emission from core-collapse supernovae observed with H.E.S.S.
Upper limits on very-high-energy gamma-ray emission from core-collapse supernovae observed with H.E.S.S. Open
Young core-collapse supernovae with dense-wind progenitors may be able to accelerate cosmic-ray hadrons beyond the knee of the cosmic-ray spectrum, and this may result in measurable gamma-ray emission. We searched for gamma-ray emission fr…
View article: Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$ K ¯ 0 Λ c + consistent with a charged $$\Xi _c(2930)^{+}$$ Ξ c ( 2930 ) + , and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$ B ¯ 0 → K ¯ 0 Λ c + Λ ¯ c - at Belle
Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$ K ¯ 0 Λ c + consistent with a charged $$\Xi _c(2930)^{+}$$ Ξ c ( 2930 ) + , and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$ B ¯ 0 → K ¯ 0 Λ c + Λ ¯ c - at Belle Open
We report evidence for the charged charmed-strange baryon $\Xi_{c}(2930)$ with a signal significance of 3.9$\sigma$. The charged $\Xi_{c}(2930)$ is found in its decay to $K_{S}^{0} \Lambda_{c}$ in the substructure of $B^{0} \to K^{0}_{S} \…
View article: The <i>γ</i>-ray spectrum of the core of Centaurus A as observed with H.E.S.S. and <i>Fermi</i>-LAT
The <i>γ</i>-ray spectrum of the core of Centaurus A as observed with H.E.S.S. and <i>Fermi</i>-LAT Open
Centaurus A (Cen A) is the nearest radio galaxy discovered as a very-high-energy (VHE; 100 GeV–100 TeV) γ -ray source by the High Energy Stereoscopic System (H.E.S.S.). It is a faint VHE γ -ray emitter, though its VHE flux exceeds both the…
View article: The starburst galaxy NGC 253 revisited by H.E.S.S. and <i>Fermi</i>-LAT
The starburst galaxy NGC 253 revisited by H.E.S.S. and <i>Fermi</i>-LAT Open
Context. NGC 253 is one of only two starburst galaxies found to emit γ -rays from hundreds of MeV to multi-TeV energies. Accurate measurements of the very-high-energy (VHE; E > 100 GeV) and high-energy (HE; E > 60 MeV) spectra are crucial …
View article: Observation of $$\Xi _{c}(2930)^0$$ Ξ c ( 2930 ) 0 and updated measurement of $$B^{-} \rightarrow K^{-} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$ B - → K - Λ c + Λ ¯ c - at Belle
Observation of $$\Xi _{c}(2930)^0$$ Ξ c ( 2930 ) 0 and updated measurement of $$B^{-} \rightarrow K^{-} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$ B - → K - Λ c + Λ ¯ c - at Belle Open
View article: Population study of Galactic supernova remnants at very high<i>γ</i>-ray energies with H.E.S.S.
Population study of Galactic supernova remnants at very high<i>γ</i>-ray energies with H.E.S.S. Open
Shell-type supernova remnants (SNRs) are considered prime candidates for the acceleration of Galactic cosmic rays (CRs) up to the knee of the CR spectrum at E ≈ 3 × 10 15 eV. Our Milky Way galaxy hosts more than 350 SNRs discovered at radi…
View article: A search for new supernova remnant shells in the Galactic plane with H.E.S.S.
A search for new supernova remnant shells in the Galactic plane with H.E.S.S. Open
A search for new supernova remnants (SNRs) has been conducted using TeV γ -ray data from the H.E.S.S. Galactic plane survey. As an identification criterion, shell morphologies that are characteristic for known resolved TeV SNRs have been u…
View article: Deeper H.E.S.S. observations of Vela Junior (RX J0852.0−4622): Morphologystudies and resolved spectroscopy
Deeper H.E.S.S. observations of Vela Junior (RX J0852.0−4622): Morphologystudies and resolved spectroscopy Open
Aims. We study γ -ray emission from the shell-type supernova remnant (SNR) RX J0852.0−4622 to better characterize its spectral properties and its distribution over the SNR. Methods. The analysis of an extended High Energy Spectroscopic Sys…
View article: The population of TeV pulsar wind nebulae in the H.E.S.S. Galactic Plane Survey
The population of TeV pulsar wind nebulae in the H.E.S.S. Galactic Plane Survey Open
The nine-year H.E.S.S. Galactic Plane Survey (HGPS) has yielded the most uniform observation scan of the inner Milky Way in the TeV gamma-ray band to date. The sky maps and source catalogue of the HGPS allow for a systematic study of the p…
View article: H.E.S.S. observations of RX J1713.7−3946 with improved angular and spectral resolution: Evidence for gamma-ray emission extending beyond the X-ray emitting shell
H.E.S.S. observations of RX J1713.7−3946 with improved angular and spectral resolution: Evidence for gamma-ray emission extending beyond the X-ray emitting shell Open
Supernova remnants exhibit shock fronts (shells) that can accelerate charged particles up to very high energies. In the past decade, measurements of a handful of shell-type supernova remnants in very high-energy gamma rays have provided un…
View article: Gamma-ray blazar spectra with H.E.S.S. II mono analysis: The case of PKS 2155−304 and PG 1553+113
Gamma-ray blazar spectra with H.E.S.S. II mono analysis: The case of PKS 2155−304 and PG 1553+113 Open
Context. The addition of a 28 m Cherenkov telescope (CT5) to the H.E.S.S. array extended the experiment’s sensitivityto lower energies. The lowest energy threshold is obtained using monoscopic analysis of data taken with CT5, providing acc…