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View article: A Search for Minute-timescale Flares from the Transient AT 2024wpp
A Search for Minute-timescale Flares from the Transient AT 2024wpp Open
The AT 2018cow-like fast blue optical transient AT 2022tsd showed a large number of a few-minute-duration, high-luminosity (∼10 43 erg s −1 ) flares. We present an intensive search for such flares from another 18cow-like event, AT 2024wpp.…
View article: Accurate photometric calibration by fitting the system transmission
Accurate photometric calibration by fitting the system transmission Open
Context . Transforming the instrumental photometry of ground-based telescopes into a calibrated physical flux in a well-defined passband is a major challenge in astronomy. Along with the intrinsic instrumental difference between telescopes…
View article: Accurate absolute photometric calibration by fitting the system transmission
Accurate absolute photometric calibration by fitting the system transmission Open
Transforming the instrumental photometry of ground-based telescopes into a calibrated physical flux in a well-defined passband is a major challenge in astronomy. Along with the intrinsic instrumental difference between telescopes sharing t…
View article: TRANSLIENT: Detecting Transients Resulting from Point-source Motion or Astrometric Errors
TRANSLIENT: Detecting Transients Resulting from Point-source Motion or Astrometric Errors Open
Detection of moving sources over a complicated background is important for several reasons. First is measuring the astrophysical motion of the source. Second is that such motion resulting from atmospheric scintillation, color refraction, o…
View article: TRANSLIENT: Detecting Transients Resulting from Point Source Motion or Astrometric Errors
TRANSLIENT: Detecting Transients Resulting from Point Source Motion or Astrometric Errors Open
Detection of moving sources over complicated background is important for several reasons. First is measuring the astrophysical motion of the source. Second is that such motion resulting from atmospheric scintillation, color refraction, or …
View article: Probing VHE gamma-ray emission from GW events with H.E.S.S
Probing VHE gamma-ray emission from GW events with H.E.S.S Open
Gravitational wave (GW) events, particularly those connected to the merger of compact objects such as neutron stars, are believed to be the primary source of short gamma-ray bursts. To explore the very high energy (VHE) component of the em…
View article: Probing VHE gamma-ray emission from GW events with H.E.S.S.
Probing VHE gamma-ray emission from GW events with H.E.S.S. Open
Gravitational wave (GW) events, particularly those connected to the merger of compact objects such as neutron stars, are believed to be the primary source of short gamma-ray bursts. To explore the very high energy (VHE) component of the em…
View article: The Large Array Survey Telescope—System Overview and Performances
The Large Array Survey Telescope—System Overview and Performances Open
The Large Array Survey Telescope (LAST) is a wide-field visible-light telescope array designed to explore the variable and transient sky with a high cadence. LAST will be composed of 48, 28 cm f/2.2 telescopes (32 already installed) equipp…
View article: Search for VHE gamma-ray emission from the TDE candidate AT 2021uqv with H.E.S.S.
Search for VHE gamma-ray emission from the TDE candidate AT 2021uqv with H.E.S.S. Open
Tidal Disruption Events (TDEs) are a relatively young class of transient phenomena, which occur whenever a star approaches a supermassive black hole (SMBH) close enough to be ripped apart by its tidal forces. Part of the stellar debris for…
View article: H.E.S.S. Follow-up Observations of GRB 221009A
H.E.S.S. Follow-up Observations of GRB 221009A Open
GRB 221009A is the brightest gamma-ray burst (GRB) ever detected. To probe the very-high-energy (VHE; >100 GeV) emission, the High Energy Stereoscopic System (H.E.S.S.) began observations 53 hr after the triggering event, when the brightne…
View article: H.E.S.S. Follow-up Observations of GRB 221009A
H.E.S.S. Follow-up Observations of GRB 221009A Open
GRB 221009A is the brightest gamma-ray burst (GRB) ever detected. To probe the very-high-energy (VHE; >100 GeV) emission, the High Energy Stereoscopic System (H.E.S.S.) began observations 53 hr after the triggering event, when the brightne…
View article: Time-resolved hadronic particle acceleration in the recurrent nova RS Ophiuchi
Time-resolved hadronic particle acceleration in the recurrent nova RS Ophiuchi Open
Recurrent novae are repeating thermonuclear explosions in the outer layers of white dwarfs, due to the accretion of fresh material from a binary companion. The shock generated when ejected material slams into the companion star’s wind can …
View article: H.E.S.S. Follow-up Observations of Binary Black Hole Coalescence Events during the Second and Third Gravitational-wave Observing Runs of Advanced LIGO and Advanced Virgo
H.E.S.S. Follow-up Observations of Binary Black Hole Coalescence Events during the Second and Third Gravitational-wave Observing Runs of Advanced LIGO and Advanced Virgo Open
We report on the observations of four well-localized binary black hole (BBH) mergers by the High Energy Stereoscopic System (H.E.S.S.) during the second and third observing runs of Advanced LIGO and Advanced Virgo, O2 and O3. H.E.S.S. can …
View article: TeV Emission of Galactic Plane Sources with HAWC and H.E.S.S.
TeV Emission of Galactic Plane Sources with HAWC and H.E.S.S. Open
The High Altitude Water Cherenkov (HAWC) observatory and the High Energy Stereoscopic System (H.E.S.S.) are two leading instruments in the ground-based very-high-energy γ -ray domain. HAWC employs the water Cherenkov detection (WCD) techni…
View article: Evidence of 100 TeV γ-ray emission from HESS J1702-420: A new PeVatron candidate
Evidence of 100 TeV γ-ray emission from HESS J1702-420: A new PeVatron candidate Open
The identification of active PeVatrons, hadronic particle accelerators reaching the knee of the cosmic-ray spectrum (at the energy of few PeV), is crucial to understand the origin of cosmic rays in the Galaxy. In this context, we report on…
View article: Combined dark matter searches towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS
Combined dark matter searches towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS Open
Cosmological and astrophysical observations suggest that 85\% of the total matter of the Universe is made of Dark Matter (DM). However, its nature remains one of the most challenging and fundamental open questions of particle physics. Assu…
View article: Limits on primordial black hole evaporation from H.E.S.S. observations.
Limits on primordial black hole evaporation from H.E.S.S. observations. Open
Primordial Black Holes are expected to be formed in the early Universe by the gravitational collapse of overdense regions, among other mechanisms. They are also expected to loose their mass over time by the Hawking radiation process. As th…
View article: Search for TeV emission from the Fermi Bubbles at low Galactic latitudes with H.E.S.S. inner Galaxy survey
Search for TeV emission from the Fermi Bubbles at low Galactic latitudes with H.E.S.S. inner Galaxy survey Open
The Fermi Bubbles were discovered about a decade ago in the Fermi-LAT data as a double-lobe structure extending up to 55° in Galactic latitudes above and below the Galactic Center. At the moment their origin is still unknown. The H.E.S.S. …
View article: Is PKS 0625-354 another variable TeV active galactic nucleus?
Is PKS 0625-354 another variable TeV active galactic nucleus? Open
The majority of the active galactic nuclei (AGN) detected at very-high-energies above 100 GeV belong to the class of blazars with a small angle between the jet-axis and the line-of-sight. Only about 10 percent of the gamma-ray AGN are obje…
View article: H.E.S.S. ToO program on nearby core-collapse Supernovae : search for very-high energy gamma-ray emission towards the SN candidate AT2019krl in M74
H.E.S.S. ToO program on nearby core-collapse Supernovae : search for very-high energy gamma-ray emission towards the SN candidate AT2019krl in M74 Open
While the youngest known supernova remnants (SNRs), such as Cassiopeia A (Cas A), have been proven to be able to accelerate cosmic rays (CRs) only up to $\\sim$10$^{14}\\,\\mathrm{eV}$ at their present evolutionary stages, recent studies h…
View article: Detection of extended TeV emission around the Geminga pulsar with H.E.S.S.
Detection of extended TeV emission around the Geminga pulsar with H.E.S.S. Open
Highly extended gamma-ray emission around the Geminga pulsar was discovered by Milagro and verified by HAWC. Despite many observations with Imaging Atmospheric Cherenkov Telescopes (IACTs), detection of gamma-ray emission on angular scales…
View article: Observation of burst activity from SGR1935+2154 associated to first galactic FRB with H.E.S.S.
Observation of burst activity from SGR1935+2154 associated to first galactic FRB with H.E.S.S. Open
Fast radio bursts (FRB) are enigmatic powerful single radio pulses with durations of several milliseconds and high brightness temperatures suggesting coherent emission mechanism. For the time being a number of extragalactic FRBs have been …
View article: Search for dark matter annihilation towards the inner Milky Way halo with the H.E.S.S. Inner Galaxy Survey
Search for dark matter annihilation towards the inner Milky Way halo with the H.E.S.S. Inner Galaxy Survey Open
The presence of dark matter (DM) is suggested by a wealth of astrophysical and cosmological measurements. However, its underlying nature is yet unknown. Among the most promising candidates\nare weakly interacting massive particles (WIMPs):…
View article: Deep observations of Kepler's SNR with H.E.S.S.
Deep observations of Kepler's SNR with H.E.S.S. Open
Kepler’s supernova remnant (SNR) which is produced by the most recent naked-eye supernova in our Galaxy is one of the best studied SNRs, but its gamma-ray detection has eluded us so far. Observations with modern imaging atmospheric Cherenk…
View article: Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow
Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow Open
An intrinsic gamma-ray burst afterglow Long gamma-ray bursts (GRBs) are emitted by relativistic jets generated during the collapse of a massive star in a distant galaxy. The GRB itself lasts only a few seconds but is followed by an aftergl…
View article: H.E.S.S. and MAGIC observations of a sudden cessation of a very-high-energy γ-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 γ-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) gamma rays. The VHE gamma -ray observations with H.E.S.S.…
View article: LMC N132D: A mature supernova remnant with a power-law gamma-ray spectrum extending beyond 8 TeV
LMC N132D: A mature supernova remnant with a power-law gamma-ray spectrum extending beyond 8 TeV Open
Context. Supernova remnants (SNRs) are commonly thought to be the dominant sources of Galactic cosmic rays up to the knee of the cosmic-ray spectrum at a few PeV. Imaging Atmospheric Cherenkov Telescopes have revealed young SNRs as very-hi…
View article: Very high energy γ-ray emission from two blazars of unknown redshift and upper limits on their distance
Very high energy γ-ray emission from two blazars of unknown redshift and upper limits on their distance Open
We report on the detection of very high energy (VHE; E > 100 GeV) γ-ray emission from the BL Lac objects KUV 00311−1938 and PKS 1440−389 with the High Energy Stereoscopic System (H.E.S.S.). H.E.S.S. observations were accompanied or prec…