H.E.S.S. First Public Test Data Release

Collaboration, H. E. S. S.

doi:10.5281/zenodo.1421098

Cited by 6 publications

(3 citation statements)

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“…In addition, we show the effective areas for Fermi (red), DAMPE (green) and H.E.S.S. Data Level 3 (DL3) [42] (orange).…”

Section: The Cherenkov Telescope Array Observatorymentioning

confidence: 99%

Dark matter line searches with the Cherenkov Telescope Array

Abe,

Abhir,

Abhishek

et al. 2024

J. Cosmol. Astropart. Phys.

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Monochromatic gamma-ray signals constitute a potential smoking gun signature for annihilating or decaying dark matter particles that could relatively easily be distinguished from astrophysical or instrumental backgrounds. We provide an updated assessment of the sensitivity of the Cherenkov Telescope Array (CTA) to such signals, based on observations of the Galactic centre region as well as of selected dwarf spheroidal galaxies. We find that current limits and detection prospects for dark matter masses above 300 GeV will be significantly improved, by up to an order of magnitude in the multi-TeV range. This demonstrates that CTA will set a new standard for gamma-ray astronomy also in this respect, as the world's largest and most sensitive high-energy gamma-ray observatory, in particular due to its exquisite energy resolution at TeV energies and the adopted observational strategy focussing on regions with large dark matter densities. Throughout our analysis, we use up-to-date instrument response functions, and we thoroughly model the effect of instrumental systematic uncertainties in our statistical treatment. We further present results for other potential signatures with sharp spectral features, e.g. box-shaped spectra, that would likewise very clearly point to a particle dark matter origin.

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“…In addition, we show the effective areas for Fermi (red), DAMPE (green) and H.E.S.S. Data Level 3 (DL3) [42] (orange).…”

Section: The Cherenkov Telescope Array Observatorymentioning

confidence: 99%

Dark matter line searches with the Cherenkov Telescope Array

Abe,

Abhir,

Abhishek

et al. 2024

J. Cosmol. Astropart. Phys.

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“…The H.E.S.S. collaboration publicly released a small dataset to facilitate the establishment of open-source, high-level data [15]. Basic methods were used for event reconstruction and gamma-hadron separation when generating this dataset [17], such that the spatial accuracy is lower (and the point spread function larger) than the actual H.E.S.S.…”

Section: Hess Dl3 Dr1 Datamentioning

confidence: 99%

Searching for Short-Timescale Transients in Gamma-ray Telescope Data

Jaitly,

Kostunin,

Cescon

2023

Galaxies

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Astrophysical sources show variability in their emissions over a range of timescales, with transients such as fast radio bursts (FRBs) and magnetar giant flares (MGFs) showing variability on timescales as short as a few milliseconds. Recent advances in gamma-ray astronomy such as telescopes’ high temporal resolution and relatively high uptime, combined with follow-up programs between different facilities, should allow serendipitous observations of burst-like phenomena. Even so, no very-high-energy gamma-ray counterparts for FRBs have been detected so far, and there is a general lack of software tools suited to search for such phenomena. We present a tool capable of searching gamma-ray telescope data for transient phenomena over arbitrary timescales—it is based on the Gammapy package and recursively scans the given field of view for clusters of events within user-defined time and angular-separation intervals. The generalized implementation allows for its application in many other cases and multiple gamma-ray telescopes. The main features and methodology of the developed tool are presented here, along with an analysis of the open gamma ray telescope data performed using it.

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“…In particular, very high-energy (VHE) gamma rays experiments, like the High Energy Stereoscopic System (HESS) collaboration [27], have pointed out that the observed extragalactic background light (EBL) seems to be lower than the one estimated by models such as the minimal EBL model [28], i.e., the Universe seems to be more transparent to gamma rays than expected. This is known as the pair production anomaly [29].…”

Section: Introductionmentioning

confidence: 99%

Modification of the mean free path of very high energy photons due to a relativistic deformed kinematics

Carmona¹,

Cortés²,

Relancio³

et al. 2021

Preprint

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Ultra-high-energy physics is about to enter a new era thanks to the impressive results of experiments such as the Large High Altitude Air Shower Observatory (LHAASO), detecting photons of up to 1.4 PeV (10 15 eV). These new results could be used to test deviations with respect to special relativity. While this has been already explored within the approach of Lorentz invariance violation (LIV) theories, in this work we consider, for the first time, modifications of a relativistic deformed kinematics (which appear in doubly special relativity, or DSR, theories). In particular, we study the mean free path of very high-energy photons due to electron-positron pair creation when interacting with low-energy photons of the cosmic microwave background. Depending on the energy scale of the relativistic deformed kinematics, present (or near future) experiments can be sensitive enough to be able to identify deviations from special relativity.

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H.E.S.S. First Public Test Data Release

Cited by 6 publications

References 0 publications

Dark matter line searches with the Cherenkov Telescope Array

Dark matter line searches with the Cherenkov Telescope Array

Searching for Short-Timescale Transients in Gamma-ray Telescope Data

Modification of the mean free path of very high energy photons due to a relativistic deformed kinematics

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