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arXiv 2025年

作者： Okabe, Nobuhiro Reiprich, Thomas Grandis, Sebastian Chiu, I-Non Oguri, Masamune Umetsu, Keiichi Bulbul, Esra Bahar, Emre Balzer, Fabian Clerc, Nicolas Comparat, Johan Ghirardini, Vittorio Kleinebreil, Florian Kluge, Matthias Liu, Ang Lin, Yen-Ting Monteiro-Oliveira, Rogério Pacaud, Florian Ceja, Miriam Ramos Sanders, Jeremy Schrabback, Tim Seppi, Riccardo Sommer, Martin Zhang, Xiaoyuan Physics Program Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima739-8526 Japan Hiroshima Astrophysical Science Center Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima739-8526 Japan Core Research for Energetic Universe Hiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima739-8526 Japan Universität Bonn Auf dem Hügel 71 Bonn53121 Germany Universität Innsbruck Institut für Astro- und Teilchenphysik Technikerstr. 25/8 Innsbruck6020 Austria Center for Frontier Science Chiba University 1-33 Yayoicho Inage-ku Chiba263-8522 Japan Department of Physics Graduate School of Science Chiba University 1-33 Yayoi-Cho Inage-Ku Chiba263-8522 Japan Institute of Astronomy and Astrophysics Academia Sinica P.O. Box 23-141 Taipei10617 Taiwan Max Planck Institute for Extraterrestrial Physics Giessenbachstrasse 1 Garching85748 Germany IRAP Université de Toulouse CNRS UPS CNES Toulouse France Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University Beijing102206 China

We perform individual weak-lensing (WL) mass measurements for 78 eROSITA’s first All-Sky Survey (eRASS1) clusters in the footprint of Hyper Suprime-Cam Subaru Strategic program (HSC-SSP) S19A, without any priors of the eRASS1 X-ray quantities or assumption of the mass and concentration relation. In the sample, we find 3 clusters are mis-associated with optical counterparts and 12 clusters are poorly fitted with an NFW profile. The average mass for the 12 poor-fit clusters changes from ∼ 1014h−701 M☉ to ∼ 2 × 1013h−701 M☉ when lensing contamination from surrounding mass structures is taken into account. The scaling relations between the true mass and cluster richness and X-ray count-rate agree well with the results of the eRASS1 Western Galactic Hemisphere region based on count-rate-inferred masses, which are calibrated with the HSC-SSP, DES, and KiDS surveys. We develop a Bayesian framework for inferring the mass-concentration relation of the cluster sample, explicitly incorporating the effects of weak-lensing mass calibration in the mass-concentration parameter space. The redshift-dependent mass and concentration relation is in excellent agreement with predictions of dark-matter-only numerical simulations and previous studies using X-ray-selected clusters. Based on the two-dimensional (2D) WL analysis, the offsets between the WL-determined centers and the X-ray centroids for 36 eRASS1 clusters with high WL S/N are described by two Gaussian components. We find that the mis-centering effect with X-ray centroids is smaller than that with peaks in the galaxy maps. Stacked mass maps support a small mis-centering effect even for clusters with low WL S/N. The projected halo ellipticity is 〈Ε〉 = 0.45 at M200 ∼ 4 × 1014h−701 M☉, in agreement with results of numerical simulations and previous studies of clusters more than twice our mass. Copyright © 2025, The Authors. All rights reserved.

关键词： Dark Matter

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When climate variables improve the dengue forecasting: a machine learning approach

arXiv

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arXiv 2024年

作者： da Silva, Sidney T. Gabrick, Enrique C. Protachevicz, Paulo R. Iarosz, Kelly C. Caldas, Iberê L. Batista, Antonio M. Kurths, Jürgen Federal University of Paraná PR Curitiba81531-980 Brazil Graduate Program in Science State University of Ponta Grossa PR Ponta Grossa84030-900 Brazil Department of Physics Humboldt University Berlin Newtonstraße 15 Berlin12489 Germany Potsdam Institute for Climate Impact Research Telegrafenberg A31 Potsdam14473 Germany Institute of Physics University of São Paulo SP São Paulo05508-090 Brazil University Center UNIFATEB PR Telêmaco Borba84266-010 Brazil Department of Mathematics and Statistics State University of Ponta Grossa PR Ponta Grossa84030-900 Brazil

Dengue is a viral vector borne infectious disease that affects many countries worldwide, infecting around 390 million people per year. The main outbreaks occur in subtropical and tropical countries. We, therefore, study here the influence of climate on dengue. In particular, we consider dengue and meteorological data from Natal (2016-2019), Brazil, Iquitos (2001-2012), Peru, and Barranquilla (2011-2016), Colombia. For the analysis and simulations, we apply Machine Learning (ML) techniques, especially the Random Forest (RF) algorithm. We utilize dengue disease cases and climate data delayed by up to one week to forecast the cases of dengue. In addition, regarding as feature in the ML technique, we analyze three possibilities: only dengue cases (D);climate and dengue cases (CD);humidity and dengue cases (HD). Depending on the city, our results show that the climate data can improve or not the forecast. For instance, for Natal, the case D induces a better forecast. For Iquitos, it is better to use all the climate variables. Nonetheless, for Barranquilla, the forecast is better, when we include cases and humidity data. Another important result is that each city has an optimal region based on the training length. For Natal, when we use more than 64% and less than 80% of the time series for training, we obtain results with correlation coefficients (r) among 0.917 and 0.949 and mean absolute errors (MAE) among 57.783 and 71.768 for the D case in forecasting. The optimal range for Iquitos is obtained when 79% up to 88% of the time series is considered for training. For this case, the best case is CD, having a minimum r equal to 0.850 and maximum 0.887, while values of MAE oscillate among 2.780 and 4.156. For Barranquilla, the optimal range occurs between 72% until 82% of length training. In this case, the better approach is HD, where the measures exhibit a minimum r equal to 0.942 and maximum 0.953, while the minimum and maximum MAE vary among 6.085 and 6.669. We show that

关键词： Machine learning

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Competing charge and magnetic order in the candidate centrosymmetric skyrmion host EuGa2Al2

arXiv

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arXiv 2023年

作者： Vibhakar, A.M. Khalyavin, D.D. Moya, J.M. Manuel, P. Orlandi, F. Lei, S. Morosan, E. Bombardi, A. Diamond Light Source Ltd. Harwell Science and Innovation Campus Oxfordshire DidcotOX11 0DE United Kingdom ISIS facility Rutherford Appleton Laboratory-STFC Chilton DidcotOX11 0QX United Kingdom Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States Clarendon Laboratory Department of Physics University of Oxford Parks Road OxfordOX1 3PU United Kingdom

Eu(Ga1-xAlx)4 are centrosymmetric systems that have recently been identified as candidates to stabilise topologically non-trivial magnetic phases, such as skyrmion lattices. In this Letter, we present a high-resolution resonant x-ray and neutron scattering study on EuGa2Al2 that provides new details of the complex coupling between the electronic ordering phenomena. Our results unambiguously demonstrate that the system orders to form a spin density wave with moments aligned perpendicular to the direction of the propagation vector, and upon further cooling, a cycloid with moments in the ab plane, in contrast to what has been reported in the literature. We show that concomitant with the onset of the spin density wave is the suppression of the charge order, indicative of a coupling between the localised 4f electrons and itinerant electron density. Furthermore we demonstrate that the charge density wave order breaks the four-fold symmetry present in the I4/mmm crystal structure, thus declassifying these systems as square-net magnets. Copyright © 2023, The Authors. All rights reserved.

关键词： Aluminum alloys

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AstroPix: A Pixelated HVCMOS Sensor for Space-Based Gamma-Ray Measurement

arXiv

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arXiv 2025年

作者： Steinhebel, Amanda L. Caputo, Regina Violette, Daniel P. Affolder, Anthony Bauman, Autumn Chinatti, Carolyn Deshmukh, Aware Fadayev, Vitaliy Fukazawa, Yasushi Jadhav, Manoj Kierans, Carolyn Kim, Bobae Kim, Jihee Klest, Henry Kroger, Olivia Kumar, Kavic Kushima, Shin Lauenstein, Jean-Marie Leys, Richard Martinez-Mckinney, Forest Metcalfe, Jessica Metzler, Zachary Mitchell, John W. Nakano, Norito Ott, Jennifer Peric, Ivan Perkins, Jeremy S. Rudin, Max R. Shin, Taylor K.W. Sommer, Grant Striebig, Nicolas Suda, Yusuke Tajima, Hiroyasu Valverde, Janeth Zurek, Maria NASA Postdoctoral Program NASA Goddard Space Flight Center MD United States University of California Santa CruzCA United States University of Colorado DenverCO United States NASA Office of STEM Engagement WashingtonDC United States Carleton College Minnesota United States Center for Research and Exploration in Space Science and Technology Maryland United States Physics Program Graduate School of Advanced Science and Engineering Hiroshima University Japan Argonne National Laboratory Illinois United States University of Maryland MD United States Institute for Space-Earth Environmental Research Nagoya University Japan Karlsruher Institut für Technologie Germany Rice University TX United States The George Washington University WashingtonDC United States Kobayashi-Maskawa Institute for the Origin of Particles and the Universe Nagoya University Japan Department of Physics Center for Space Sciences and Technology University of Maryland Baltimore CountyMD United States

A next-generation medium-energy gamma-ray telescope targeting the MeV range would address open questions in astrophysics regarding how extreme conditions accelerate cosmic-ray particles, produce relativistic jet outflows, and more. One concept, AMEGO-X, relies upon the mission-enabling CMOS Monolithic Active Pixel Sensor silicon chip AstroPix. AstroPix is designed for space-based use, featuring low noise, low power consumption, and high scalability. Desired performance of the device include an energy resolution of 5 keV (or 10% FWHM) at 122 keV and a dynamic range per-pixel of 25 − 700 keV, enabled by the addition of a high-voltage bias to each pixel which supports a depletion depth of 500 μm. This work reports on the status of the AstroPix development process with emphasis on the current version under test, version three (v3), and highlights of version two (v2). Version 3 achieves energy resolution of 10.4 ± 3.2% at 59.5 keV and 94 ± 6 μm depletion in a low-resistivity test silicon substrate. © 2025, CC BY.

关键词： Cosmology

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Development of an advanced SiPM camera for the Large Size Telescope of the Cherenkov Telescope Array Observatory 37

Development of an advanced SiPM camera for the Large Size Te...

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37th International Cosmic Ray Conference, ICRC 2021

作者： Bellato, M. Bergnoli, A. Bernasconi, E. Biland, A. Charbon, E. Corti, D. Gascón, D. Gómez, S. Ziȩtara, K. Abe, H. Aguasca, A. Agudo, I. Antonelli, L.A. Aramo, C. Armstrong, T. Artero, M. Asano, K. Ashkar, H. Aubert, P. Baktash, A. Bamba, A. Baquero Larriva, A. Baroncelli, L. Barres de Almeida, U. Barrio, J.A. Batkovic, I. Becerra González, J. Bernardos, M.I. Berti, A. Biederbeck, N. Bigongiari, C. Blanch, O. Bonnoli, G. Bordas, P. Bose, D. Bulgarelli, A. Burelli, I. Buscemi, M. Cardillo, M. Caroff, S. Carosi, A. Cassol, F. Cerruti, M. Chai, Y. Cheng, K. Chikawa, M. Chytka, L. Contreras, J.L. Cortina, J. Costantini, H. Dalchenko, M. De Angelis, A. de Bony de Lavergne, M. Deleglise, G. Delgado, C. Delgado Mengual, J. della Volpe, D. Depaoli, D. Di Pierro, F. Di Venere, L. Díaz, C. Dominik, R.M. Dominis Prester, D. Donini, A. Dorner, D. Doro, M. Elsässer, D. Emery, G. Escudero, J. Fiasson, A. Foffano, L. Fonseca, M.V. Freixas Coromina, L. Fukami, S. Fukazawa, Y. Garcia, E. Garcia López, R. Giglietto, N. Giordano, F. Gliwny, P. Godinovic, N. Green, D. Grespan, P. Gunji, S. Hackfeld, J. Hadasch, D. Hahn, A. Hassan, T. Hayashi, K. Heckmann, L. Heller, M. Herrera Llorente, J. Hirotani, K. Hoffmann, D. Horns, D. Houles, J. Hrabovsky, M. Hrupec, D. Hui, D. Hütten, M. Inada, T. Inome, Y. Iori, M. Ishio, K. Iwamura, Y. Jacquemont, M. Jimenez Martinez, I. Jouvin, L. Jurysek, J. Kagaya, M. Karas, V. Katagiri, H. Kataoka, J. Kerszberg, D. Kobayashi, Y. Kong, A. Kubo, H. Kushida, J. Lamanna, G. Lamastra, A. Le Flour, T. Longo, F. López-Coto, R. López-Moya, M. López-Oramas, A. Luque-Escamilla, P.L. Majumdar, P. Makariev, M. Mandat, D. Manganaro, M. Mannheim, K. Mariotti, M. Marquez, P. Marsella, G. Martí, J. Martinez, O. Martínez, G. Martínez, M. Marusevec, P. Mas, A. Maurin, G. Mazin, D. Mestre Guillen, E. Micanovic, S. Miceli, D. Miener, T. Miranda, J.M. Miranda, L.D.M. Mirzoyan, R. Mizuno, T. Molina, E. Montaruli, T. Monteiro, I. AQUA EPFL Neuchâtel Switzerland ETH Zurich Institute for Particle Physics Otto-Stern-Weg 5 Zurich8093 Switzerland Astronomical Observatory Jagiellonian University ul. Orla 171 Kraków30-244 Poland Institute for Cosmic Ray Research University of Tokyo Japan Departament de Física Quàntica i Astrofísica Institut de Ciències del Cosmos Universitat de Barcelona IEEC-UB Martí i Franquès 1 Barcelona08028 Spain Instituto de Astrofísica de Andalucía CSIC Spain INAF Osservatorio Astronomico di Roma Italy INFN Sezione di Napoli Italy Aix Marseille Univ CNRS IN2P3 CPPM Marseille France Barcelona Institute of Science and Technology Spain IRFU CEA Université Paris-Saclay France LAPP Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS IN2P3 Annecy France Universität Hamburg Institut für Experimentalphysik Germany Graduate School of Science University of Tokyo Japan EMFTEL department IPARCOS Universidad Complutense de Madrid Spain INAF Osservatorio di Astrofisica e Scienza dello spazio di Bologna Centro Brasileiro de Pesquisas Físicas Brazil INFN Sezione di Padova Università degli Studi di Padova Via Marzolo 8 Padova35131 Italy Instituto de Astrofísica de Canarias Departamento de Astrofísica Universidad de La Laguna Spain Max-Planck-Institut für Physik Germany Department of Physics TU Dortmund University Germany Saha Institute of Nuclear Physics India INFN Sezione di Trieste Università degli Studi di Udine Italy INFN Sezione di Catania Italy University of Geneva Département de Physique Nucléaire et Corpusculaire 24 Quai Ernest Ansermet GenèveCH-1211 Switzerland Palacky University Olomouc Faculty of Science Czech Republic CIEMAT Port d’Informació Científica INFN Sezione di Torino via P. Giuria 1 Torino10125 Italy Dipartimento di Fisica Universitá degli Studi di Torino via P. Giuria 1 Torino10125 Italy INFN Sezione di Bari Università di Bari University of Rijeka Department of Physics Institute for Theoretical Physics and Astrophysics Universitä

Silicon photomultipliers (SiPMs) have become the baseline choice for cameras of the small-sized telescopes (SSTs) of the Cherenkov Telescope Array (CTA). On the other hand, SiPMs are relatively new to the field and covering large surfaces and operating at high data rates still are challenges to outperform photomultipliers (PMTs). The higher sensitivity in the near infra-red and longer signals compared to PMTs result in higher night sky background rate for SiPMs. However, the robustness of the SiPMs represents a unique opportunity to ensure long-term operation with low maintenance and better duty cycle than PMTs. The proposed camera for large size telescopes will feature 0.05◦ pixels, low power and fast front-end electronics and a fully digital readout. In this work, we present the status of dedicated simulations and data analysis for the performance estimation. The design features and the different strategies identified, so far, to tackle the demanding requirements and the improved performance are described. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Photomultipliers

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Outcoupling Hyperbolic Modes from Aligned Carbon Nanotube Films

Outcoupling Hyperbolic Modes from Aligned Carbon Nanotube Fi...

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CLEO: QELS_Fundamental science, QELS 2022

作者： Jerome, Bryant Prasad, Ciril S. Doumani, Jacques Dewey, Oliver S. Baydin, Andrey Pasquali, Matteo Kono, Junichiro Gao, Weilu Alabastri, Alessandro Naik, Gururaj V. Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Chemical and Biomolecular Engineering Rice University HoustonTX77005 United States Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Chemistry Rice University HoustonTX77005 United States Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States Department of Electrical and Computer Engineering University of Utah Salt Lake CityUT84112 United States

Aligned carbon nanotube films make an excellent hyperbolic material platform in the infrared. Here, we experimentally demonstrate the presence of high-k modes in aligned carbon nanotube films and outcouple them to fre... 详细信息

ISBN: (纸本)9781557528209

关键词： Carbon films

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Mechanism of skyrmion condensation and pairing for twisted bi-layer graphene

arXiv

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arXiv 2021年

作者： Jing, Dian Tyner, Alexander Conkey Goswami, Pallab Department of Physics and Astronomy Northwestern University EvanstonIL60208 United States Department of Chemical and Biological Engineering Northwestern University EvanstonIL60208 United States Integrated Science Program Northwestern University EvanstonIL60208 United States Graduate Program in Applied Physics Northwestern University EvanstonIL60208 United States

When quantum flavor Hall insulator phases of itinerant fermions are disordered by strong quantum fluctuations, the condensation of skyrmion textures of order parameter fields can lead to superconductivity. In this work, we address the mechanism of skyrmion condensation by considering the scattering between (2+1)-dimensional, Weyl fermions and hedgehog type tunneling configurations of order parameters that violate the skyrmion-number conservation law. We show the quantized, flavor Hall conductivity (σxyf ) controls the degeneracy of topologically protected, fermion zero-modes, localized on hedgehogs, and the overlap between zero-mode eigenfunctions or't Hooft vertex determines the nature of pairing. We demonstrate the quantum-disordered, flavor Hall insulators with σxyf = 2N lead to different types of charge 2Ne− superconductivity. Some implications for the competition among flavor Hall insulators, the charge 2e− paired states in BCS and pair-density-wave channels, and the composite, charge 4e− superconductors for twisted bilayer graphene are outlined. © 2021, CC BY.

关键词： Condensation

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Empowering Precision Medicine: AI-Driven Schizophrenia Diagnosis via EEG Signals: A Comprehensive Review from 2002-2023

arXiv

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arXiv 2023年

作者： Jafari, Mahboobeh Sadeghi, Delaram Shoeibi, Afshin Alinejad-Rokny, Hamid Beheshti, Amin García, David López Chen, Zhaolin Acharya, U. Rajendra Gorriz, Juan M. Internship in BioMedical Machine Learning Lab The Graduate School of Biomedical Engineering UNSW Sydney SydneyNSW2052 Australia Data Science and Computational Intelligence Institute University of Granada Spain BioMedical Machine Learning Lab The Graduate School of Biomedical Engineering UNSW Sydney SydneyNSW2052 Australia UNSW Data Science Hub The University of New South Wales SydneyNSW2052 Australia Health Data Analytics Program Centre for Applied Artificial Intelligence Macquarie University Sydney2109 Australia Data Science Lab School of Computing Macquarie University SydneyNSW2109 Australia Monash University Melbourne Australia School of Mathematics Physics and Computing University of Southern Queensland Springfield Australia Department of Psychiatry University of Cambridge United Kingdom

Schizophrenia (SZ) is a prevalent mental disorder characterized by cognitive, emotional, and behavioral changes. Symptoms of SZ include hallucinations, illusions, delusions, lack of motivation, and difficulties in concentration. While the exact causes of SZ remain unproven, factors such as brain injuries, stress, and psychotropic drugs have been implicated in its development. SZ can be classified into different types, including paranoid, disorganized, catatonic, undifferentiated, and residual. Diagnosing SZ involves employing various tools, including clinical interviews, physical examinations, psychological evaluations, the Diagnostic and Statistical Manual of Mental Disorders (DSM), and neuroimaging techniques. Electroencephalography (EEG) recording is a significant functional neuroimaging modality that provides valuable insights into brain function during SZ. However, EEG signal analysis poses challenges for neurologists and scientists due to the presence of artifacts, long-term recordings, and the utilization of multiple channels. To address these challenges, researchers have introduced artificial intelligence (AI) techniques, encompassing conventional machine learning (ML) and deep learning (DL) methods, to aid in SZ diagnosis. This study reviews papers focused on SZ diagnosis utilizing EEG signals and AI methods. The introduction section provides a comprehensive explanation of SZ diagnosis methods and intervention techniques. Subsequently, review papers in this field are discussed, followed by an introduction to the AI methods employed for SZ diagnosis and a summary of relevant papers presented in tabular form. Additionally, this study reports on the most significant challenges encountered in SZ diagnosis, as identified through a review of papers in this field. Future directions to overcome these challenges are also addressed. The discussion section examines the specific details of each paper, culminating in the presentation of conclusions and findings. © 2023,

关键词： Electroencephalography

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Improved Measurements of Muonic Helium Ground-State Hyperfine Structure at a Near-Zero Magnetic Field

arXiv

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arXiv 2023年

作者： Strasser, P. Fukumura, S. Iwai, R. Kanda, S. Kawamura, S. Kitaguchi, M. Nishimura, S. Seo, S. Shimizu, H.M. Shimomura, K. Tada, H. Torii, H.A. 1-1 Oho Ibaraki Tsukuba305-0801 Japan Muon Science Section Materials and Life Science Division J-PARC Center 2-4 Shirakata Tokai-mura Naka-gun Ibaraki319-1195 Japan Materials Structure Science Program Graduate Institute for Advanced Studies SOKENDAI 1-1 Oho Ibaraki Tsukuba305-0801 Japan Department of Physics Nagoya University Furo-cho Chikusa-ku Nagoya464-8601 Japan Kobayashi-Maskawa Institute Nagoya University Furo-cho Chikusa-ku Nagoya464-8602 Japan Graduate School of Arts and Sciences The University of Tokyo 3-8-1 Komaba Meguro Tokyo153-8902 Japan School of Science The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-0033 Japan

Muonic helium atom hyperfine structure (HFS) measurements are a sensitive tool to test the three-body atomic system and bound-state quantum electrodynamics theory, and determine fundamental constants of the negative muon magnetic moment and mass. The world’s most intense pulsed negative muon beam at the Muon science Facility of the Japan Proton Accelerator Research Complex allows improvement of previous measurements and testing further CPT invariance by comparing the magnetic moments and masses of positive and negative muons (second-generation leptons). We report new ground-state HFS measurements of muonic helium-4 atoms at a near-zero magnetic field, performed for the first time using a small admixture of CH4 as an electron donor to form neutral muonic helium atoms efficiently. Our analysis gives ∆ν = 4464.980(20) MHz (4.5 ppm), which is more precise than both previous measurements at weak and high fields. The muonium ground-state HFS was also measured under the same conditions to investigate the isotopic effect on the frequency shift due to the gas density dependence in He with CH4 admixture and compared with previous studies. Muonium and muonic helium can be regarded as light and heavy hydrogen isotopes with an isotopic mass ratio of 36. No isotopic effect was observed within the current experimental precision. Copyright © 2023, The Authors. All rights reserved.

关键词： Magnetic moments

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Camera Calibration of the CTA-LST prototype 37

Camera Calibration of the CTA-LST prototype

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37th International Cosmic Ray Conference, ICRC 2021

作者： Kobayashi, Yukiho Okumura, Akira Cassol, Franca Katagiri, Hideaki Sitarek, Julian Gliwny, Pawel Nozaki, Seiya Nogami, Yuto Abe, H. Aguasca, A. Agudo, I. Antonelli, L.A. Aramo, C. Armstrong, T. Artero, M. Asano, K. Ashkar, H. Aubert, P. Baktash, A. Bamba, A. Baquero Larriva, A. Baroncelli, L. Barres de Almeida, U. Barrio, J.A. Batkovic, I. Becerra Gonzalez, J. Bernardos, M.I. Berti, A. Biederbeck, N. Bigongiari, C. Blanch, O. Bonnoli, G. Bordas, P. Bose, D. Bulgarelli, A. Burelli, I. Buscemi, M. Cardillo, M. Caroff, S. Carosi, A. Cerruti, M. Chai, Y. Cheng, K. Chikawa, M. Chytka, L. Contreras, J.L. Cortina, J. Costantini, H. Dalchenko, M. De Angelis, A. de Bony de Lavergne, M. Deleglise, G. Delgado, C. Delgado Mengual, J. della Volpe, D. Depaoli, D. Di Pierro, F. Di Venere, L. Daaz, C. Dominik, R.M. Dominis Prester, D. Donini, A. Dorner, D. Doro, M. Elsaasser, D. Emery, G. Escudero, J. Fiasson, A. Foffano, L. Fonseca, M.V. Freixas Coromina, L. Fukami, S. Fukazawa, Y. Garcia, E. Garcia Lapez, R. Giglietto, N. Giordano, F. Godinovic, N. Green, D. Grespan, P. Gunji, S. Hackfeld, J. Hadasch, D. Hahn, A. Hassan, T. Hayashi, K. Heckmann, L. Heller, M. Herrera Llorente, J. Hirotani, K. Hoffmann, D. Horns, D. Houles, J. Hrabovsky, M. Hrupec, D. Hui, D. HÃŒtten, M. Inada, T. Inome, Y. Iori, M. Ishio, K. Iwamura, Y. Jacquemont, M. Jimenez Martinez, I. Jouvin, L. Jurysek, J. Kagaya, M. Karas, V. Kataoka, J. Kerszberg, D. Kong, A. Kubo, H. Kushida, J. Lamanna, G. Lamastra, A. Le Flour, T. Longo, F. Lapez-Coto, R. Lapez-Moya, M. Lapez-Oramas, A. Luque-Escamilla, P.L. Majumdar, P. Makariev, M. Mandat, D. Manganaro, M. Mannheim, K. Mariotti, M. Marquez, P. Marsella, G. Marta, J. Martinez, O. MartÃnez, G. MartÃnez, M. Marusevec, P. Mas, A. Maurin, G. Mazin, D. Mestre Guillen, E. Micanovic, S. Miceli, D. Miener, T. Miranda, J.M. Miranda, L.D.M. Mirzoyan, R. Mizuno, T. Molina, E. Montaruli, T. Monteiro, I. Moralejo, A. Morcuende, D. Moretti, E. Morselli, A. Mrakovcic, K. Institute for Cosmic Ray Research The University of Tokyo Chiba Japan Institute for Space-Earth Environmental Research Kobayashi-Maskawa Institute for the Origin of Particles and the Universe Nagoya University Nagoya Japan Aix Marseille Univ CNRS IN2P3 CPPM Marseille France College of Science Ibaraki University Ibaraki Japan Faculty of Physics and Applied Informatics University of Lodz ul. Pomorska 149/153 Lódz90-236 Poland Department of Physics Kyoto University Kyoto606-8502 Japan Institute for Cosmic Ray Research University of Tokyo Japan Departament de Fasica Quantica i Astrofasica Institut de Ciancies del Cosmos Universitat de Barcelona IEEC-UB Spain Instituto de Astrofasica de Andalucaa-CSIC Spain INAF - Osservatorio Astronomico di Roma Italy INFN Sezione di Napoli Italy Aix Marseille Univ CNRS IN2P3 CPPM France The Barcelona Institute of Science and Technology Spain IRFU CEA Universita© Paris-Saclay France LAPP Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS-IN2P3 Annecy France Universitaat Hamburg Institut faer Experimentalphysik Germany Graduate School of Science University of Tokyo Japan EMFTEL Department IPARCOS Universidad Complutense de Madrid Spain INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna Italy Centro Brasileiro de Pesquisas Fasicas Brazil INFN Sezione di Padova Universita degli Studi di Padova Italy Instituto de Astrofasica de Canarias Departamento de Astrofasica Universidad de La Laguna Spain Max-Planck-Institut faer Physik Germany Department of Physics TU Dortmund University Germany Saha Institute of Nuclear Physics India INFN Sezione di Trieste Universita degli Studi di Udine Italy INFN Sezione di Catania Italy Italy University of Geneva Da©partement de Physique Nucla©aire et Corpusculaire Switzerland Palacky University Olomouc Faculty of Science Czech Republic CIEMAT Spain Port d'Informacia Cientafica Spain INFN Sezione di Torino Italy Dipartimento di Fisica Universita degli Studi di Tori

The Cherenkov Telescope Array (CTA) is the next-generation gamma-ray observatory that is expected to reach one order of magnitude better sensitivity than that of current telescope arrays. The Large-Sized Telescopes (LSTs) have an essential role in extending the energy range down to 20 GeV. The prototype LST (LST-1) proposed for CTA was built in La Palma, the northern site of CTA, in 2018. LST-1 is currently in its commissioning phase and moving towards scientific observations. The LST-1 camera consists of 1855 photomultiplier tubes (PMTs) which are sensitive to Cherenkov light. PMT signals are recorded as waveforms sampled at 1 GHz rate with Domino Ring Sampler version 4 (DRS4) chips. Fast sampling is essential to achieve a low energy threshold by minimizing the integration of background light from the night sky. Absolute charge calibration can be performed by the so-called F-factor method, which allows calibration constants to be monitored even during observations. A calibration pipeline of the camera readout has been developed as part of the LST analysis chain. The pipeline performs DRS4 pedestal and timing corrections, as well as the extraction and calibration of charge and time of pulses for subsequent higher-level analysis. The performance of each calibration step is examined, and especially charge and time resolution of the camera readout are evaluated and compared to CTA requirements. We report on the current status of the calibration pipeline, including the performance of each step through to signal reconstruction, and the consistency with Monte Carlo simulations. © 2022 Sissa Medialab Srl. All rights reserved.

关键词： Calibration

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