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In this article, the potential of water Cherenkov detectors equipped with multi-PMT modules for background-free upward-going neutrino detection and improved direction reconstruction is demonstrated. By analyzing signal time traces with…

High Energy Physics - Experiment · Physics 2025-08-08 J. Alvarez-Muñiz , R. Colalillo , R. Conceição , B. S. González , V. M. Grieco , F. Guarino , M. Pimenta , B. Tomé , M. Waqas

The maximum-entropy method is applied to the problem of reconstructing the projected mass density of a galaxy cluster using its gravitational lensing effects on background galaxies. We demonstrate the method by reconstructing the mass…

Astrophysics · Physics 2009-10-30 S. L. Bridle , M. P. Hobson , A. N. Lasenby , Richard Saunders

Ground-based atmospheric Cherenkov telescopes are proven to be effective instruments for observations of very high energy (VHE) gamma-radiation from celestial objects. For effective use of such technique one needs detailed Monte Carlo…

Astrophysics · Physics 2009-10-31 A. Konopelko , A. Plyasheshnikov

A new Monte Carlo model is proposed for radiative corrections to Bhabha scattering by extending QEDPS developed for multi-photon emission in muon pair production in $e^+e^-$ annihilation. This is the QED version of the model known as parton…

High Energy Physics - Phenomenology · Physics 2017-02-01 J. Fujimoto , Y. Shimizu , T. Munehisa

The H.E.S.S. experiment entered its phase II with the addition of a new, large telescope named CT 5 that was added to the centre of the existing array of four smaller telescopes. The new telescope is able to detect fainter air showers due…

Instrumentation and Methods for Astrophysics · Physics 2015-09-03 Thomas Murach , Michael Gajdus , Robert Daniel Parsons

The seek of high precision analyses in $\gamma$-ray astronomy leads to the implementation of multivariate combination, benefiting from several reconstruction methods. Such analysis, called $X_{eff}$, was developed for the H.E.S.S. data…

Instrumentation and Methods for Astrophysics · Physics 2015-09-14 C. Trichard , A. Fiasson , G. Maurin , G. Lamanna

We have developed a sophisticated model of the radio emission from extensive air showers in the scheme of coherent geosynchrotron radiation, providing a theoretical foundation for the interpretation of experimental data from current and…

Astrophysics · Physics 2011-04-12 Tim Huege , Heino Falcke

The reparameterization gradient has become a widely used method to obtain Monte Carlo gradients to optimize the variational objective. However, this technique does not easily apply to commonly used distributions such as beta or gamma…

Machine Learning · Statistics 2016-10-20 Francisco J. R. Ruiz , Michalis K. Titsias , David M. Blei

The Heitler-Matthews model for hadronic air showers will be extended to all the generations of electromagnetic subshowers in the hadronic cascade. The analysis is outlined in detail for showers initiated by primary protons. For showers…

High Energy Astrophysical Phenomena · Physics 2014-03-06 Hans Montanus

This paper develops an efficient numerical method for the inverse scattering problem of a time-harmonic plane wave incident on a perfectly reflecting random periodic structure. The method is based on a novel combination of the Monte Carlo…

Numerical Analysis · Mathematics 2020-08-13 Gang Bao , Yiwen Lin , Xiang Xu

In this paper we proposed a joint reconstruction of \gray events using both extensive air array (EAS) and Imaging air Cherenkov Telescope array (IACT). We considered eight Cherenkov telescopes to be built on the LHAASO (Large High Altitude…

High Energy Astrophysical Phenomena · Physics 2024-09-23 Zhipeng Zhang , Ruizhi Yang , Shoushan Zhang , Liqiao Yin , Jiali Liu , Yudong Wang , Lingling Ma , Zhen Cao

The current generation of air shower radio arrays has demonstrated that the atmospheric depth of the shower maximum Xmax can be reconstructed with high accuracy. These experiments are now contributing to mass composition studies in the…

Subatomic particles can interact with target nuclei in matter or decay in flight, and an individual high-energy particle can induce a particle shower composed of numerous, lower-energy secondaries. These particle showers broadly exhibit…

High Energy Astrophysical Phenomena · Physics 2026-04-07 Ian Crawshaw , Tianlu Yuan , Emre Yildizci , Lu Lu , Anatoli Fedynitch

To simulate the interaction of cosmic rays with the Earth atmosphere requires highly complex computational resources and several statistical techniques have been developed to simplify those calculations. It is common to implement the…

Instrumentation and Methods for Astrophysics · Physics 2015-12-10 A. Estupiñán , H. Asorey , L. A. Núñez

A new accurate method for reconstructing the arrival direction of an extensive air shower (EAS) is described. Compared to existing methods, it is not subject to minimization of a function and, therefore, is fast and stable. This method also…

Instrumentation and Methods for Astrophysics · Physics 2016-11-24 H. Hedayati Kh

At ground level, the azimuthal distribution of muons in inclined Extensive Air Showers (EAS) is asymmetric, mainly due to geometric effects. Several EAS observables sensitive to the primary particle mass, are constructed after mapping the…

High Energy Astrophysical Phenomena · Physics 2020-05-06 Nicusor Arsene , Markus Roth , Octavian Sima

This paper introduces a Monte Carlo method for maximum likelihood inference in the context of discretely observed diffusion processes. The method gives unbiased and a.s.\@ continuous estimators of the likelihood function for a family of…

Statistics Theory · Mathematics 2009-03-03 Alexandros Beskos , Omiros Papaspiliopoulos , Gareth Roberts

A major challenge in ground-based ultra-high-energy gamma-ray observations remains in discriminating sporadic gamma-ray signals from a huge background of cosmic-ray events. To achieve good discrimination power of gamma rays against protons,…

High Energy Astrophysical Phenomena · Physics 2025-12-08 Animesh Basak , Meghamani Haldar , Kishor Chaudhury , Rajat K. Dey

We discuss multivariate Monte Carlo methods appropriate for X-ray dispersive spectrometers. Dispersive spectrometers have many advantages for high resolution spectroscopy in the X-ray band. Analysis of data from these instruments is…

Astrophysics · Physics 2007-05-23 J. R. Peterson , J. G. Jernigan , S. M. Kahn

With the commissioning of the second MAGIC gamma-ray Cherenkov telescope situated close to MAGIC-I, the standard analysis package of the MAGIC collaboration, MARS, has been upgraded in order to perform the stereoscopic reconstruction of the…

Instrumentation and Methods for Astrophysics · Physics 2019-08-13 A. Moralejo , M. Gaug , E. Carmona , P. Colin , C. Delgado , S. Lombardi , D. Mazin , V. Scalzotto , J. Sitarek , D. Tescaro
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