A. Lemière
A5106236615- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Nuclear Physics and Applications
Université Paris Cité
2007-2022
Laboratoire AstroParticule et Cosmologie
2007-2022
Centre National de la Recherche Scientifique
2007-2022
Sorbonne Paris Cité
2017-2020
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2017-2020
Délégation Paris 7
2017-2020
Aims.To investigate the very high energy (VHE: >100 GeV) γ-ray emission from high-frequency peaked BL Lac 1ES 0229+200.
The colliding-wind binary system $\eta$ Carinae has been identified as a source of high-energy (HE, below $\sim$100\,GeV) and very-high-energy (VHE, above gamma rays in the last decade, making it unique among these systems. With its eccentric 5.5-year-long orbit, periastron passage, during which stars are separated by only $1-2$\,au, is an intriguing time interval to probe particle acceleration processes within system. In this work, we report on extensive VHE observation campaign that for...
The colliding-wind binary system η Carinae has been identified as a source of high-energy (HE, below ∼100,GeV) and very (VHE, above gamma rays in the last decade, making it unique among these systems. With its eccentric 5.5-year-long orbit, periastron passage, during which stars are separated by only $1-2$,au, is an intriguing time interval to probe particle acceleration processes within system. In this work, we report on extensive VHE observation campaign that for first covers full passage...
Observations with imaging atmospheric Cherenkov telescopes (IACTs) have enhanced our knowledge of nearby supernova (SN) remnants ages younger than 500 yr by establishing Cassiopeia A and the remnant Tycho’s SN as very-high-energy (VHE) γ -ray sources. The Kepler’s SN, which is product most recent naked-eye in Galaxy, comparable age to other two, but significantly more distant. If luminosities SNe are similar, then latter expected be one faintest sources within reach current generation IACT...
The unidentified TeV source HESS J1702-420 has recently been proposed as a new hadronic PeVatron candidate, based on the discovery of small-scale emission sub-region with extremely hard gamma-ray spectrum up to 100 (named J1702-420A). Given difficulty discriminate between or leptonic origin emission, H.E.S.S. measurement alone, we opted for multi-wavelength approach. A deep X-ray observation was carried out using XMM-Newton satellite, goal probing possible association hidden accelerator. No...