Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)最新文献_第4页

Implementing IceCube in SNOwGLoBES

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) Pub Date : 2019-09-02 DOI: 10.22323/1.358.0975

Felix Malmenbeck, E. O’Sullivan

引用次数: 0

Particle Identification in Smartphone Camera Images Using the Distributed Electronic Cosmic-ray Observatory 利用分布式电子宇宙射线天文台识别智能手机相机图像中的粒子

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) Pub Date : 2019-09-02 DOI: 10.22323/1.358.0390

J. Vandenbroucke, M. Meehan, J. Peacock, J. Bourbeau, Felipe Campos, Cassidy Schneider, Miles Winter, A. Pizzuto, R. Morgan, Blake Gallay, A. Simons

{"title":"Particle Identification in Smartphone Camera Images Using the Distributed Electronic Cosmic-ray Observatory","authors":"J. Vandenbroucke, M. Meehan, J. Peacock, J. Bourbeau, Felipe Campos, Cassidy Schneider, Miles Winter, A. Pizzuto, R. Morgan, Blake Gallay, A. Simons","doi":"10.22323/1.358.0390","DOIUrl":"https://doi.org/10.22323/1.358.0390","url":null,"abstract":"The Distributed Electronic Cosmic-ray Observatory (DECO) is a global network of smartphones that searches images for evidence of cosmic rays and other ionizing charged particles. DECO was released to the public in 2014 and has citizen scientists from 80 countries on all seven continents participating in the project. We previously demonstrated that tracks seen in the DECO data set are caused by cosmic-ray muons by comparing the track length distribution of candidate events in the data set to the expected distribution from a cosmic-ray flux. However, robust particle identification necessary to separate cosmic rays from the radioactive background on an event-by-event basis had not previously been identified. We present a deep learning, computer vision algorithm for identifying and classifying charged particles in camera image sensors. The convolutional neural network was trained using images from the DECO data set and achieves classification performance comparable to human quality across four distinct DECO event classifications. We apply our model to the entire DECO data set and determine a selection that achieves a purity of $95%$ when applied to cosmic-ray muons and $ge 90%$ for all event types. The automated classification is run on the public DECO data set in real time in order to provide classified particle interaction images to users of the app and other interested members of the public. The model and techniques used to develop it are applicable to other smartphone-based cosmic-ray detectors and data sets consisting of images of charged particles from solid-state camera sensors.","PeriodicalId":166008,"journal":{"name":"Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114352441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Cosmic Ray Detectors and Observational Breakthroughs in Atmospheric Electricity 宇宙射线探测器和大气电的观测突破

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) Pub Date : 2019-09-02 DOI: 10.22323/1.358.0018

R. Abbasi

引用次数: 4

Recognition and classification of the cosmic-ray events in images captured by CMOS/CCD cameras CMOS/CCD相机图像中宇宙射线事件的识别与分类

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) Pub Date : 2019-09-02 DOI: 10.22323/1.358.0367

M. Niedźwiecki, K. Rzecki, Marta Marek, P. Homola, Katarzyna Smelcerza, D. A. Castillo, K. Smolek, B. Hnatyk, J. Zamora-Saá, A. Mozgova, Vahab Nazaric, D. Góra, K. Kopanski, T. Wibig, A. Duffy, J. Stasielak, Z. Zimborás, M. Kasztelan

{"title":"Recognition and classification of the cosmic-ray events in images captured by CMOS/CCD cameras","authors":"M. Niedźwiecki, K. Rzecki, Marta Marek, P. Homola, Katarzyna Smelcerza, D. A. Castillo, K. Smolek, B. Hnatyk, J. Zamora-Saá, A. Mozgova, Vahab Nazaric, D. Góra, K. Kopanski, T. Wibig, A. Duffy, J. Stasielak, Z. Zimborás, M. Kasztelan","doi":"10.22323/1.358.0367","DOIUrl":"https://doi.org/10.22323/1.358.0367","url":null,"abstract":"Muons and other ionizing radiation produced by cosmic rays and radiative decays affect CMOS/CCD sensor. When particles colliding with sensors atoms cause specific kind of noise on images recorded by cameras. We present a concept and preliminary implementation of method for recognizing those events and algorithms for image processing and their classification by machine learning. Our method consists of analyzing the shape of traces present in images recorded by a camera sensor and metadata related to an image like camera model, GPS location of camera, vertical and horizontal orientation of a camera sensor, timestamp of image acquisition, and other events recognized near-by sensors. The so created feature vectors are classified as either a muon-like event, an electron-like event or the other event, possibly noise. For muon-like events our method estimates azimuth of a muon track. Source of the data is database of CREDO (Cosmic-Ray Extremely Distributed Observatory) project and ESO (European Southern Observatory) archives. The telescope dark frames from ESO are analysed. CREDO project collected so far over 2 millions images of events from many kinds of cameralike: smartphones camera, laptop webcams and Internet of Things cameras localised around the globe.","PeriodicalId":166008,"journal":{"name":"Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121190755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

First results of the CORSIKA 8 air shower simulation framework CORSIKA 8风淋室模拟框架的初步结果

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) Pub Date : 2019-09-02 DOI: 10.22323/1.358.0399

D. Melo, M. Reininghaus, F. Riehn, R. Ulrich

引用次数: 3

Current constraints from cosmogenic neutrinos on the fraction of protons in UHECRs 宇宙起源中微子对uhecr中质子比例的当前约束

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) Pub Date : 2019-09-02 DOI: 10.22323/1.358.1025

A. V. Vliet, R. A. Batista, J. Horandel

引用次数: 1

Non-linearity correction of PMT response on the observed particle densities in GRAPES-3 PMT响应对GRAPES-3观测粒子密度的非线性修正

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) Pub Date : 2019-09-02 DOI: 10.22323/1.358.0216

A. Chandra, S. Ahmad, M. Chakraborty, S. Dugad, S. Gupta, B. Hariharan, Y. Hayashi, S. Inbanathan, P. Jagadeesan, A. Jain, P. Jain, V. Jhansi, S. Kawakami, H. Kojima, S. Mahapatra, P. Mohanty, S. Morris, P. K. Nayak, A. Oshima, D. Pattanaik, P. Rakshe, K. Ramesh, B. Rao, L. V. Reddy, S. Shibata, F. Varsi, M. Zuberi

{"title":"Non-linearity correction of PMT response on the observed particle densities in GRAPES-3","authors":"A. Chandra, S. Ahmad, M. Chakraborty, S. Dugad, S. Gupta, B. Hariharan, Y. Hayashi, S. Inbanathan, P. Jagadeesan, A. Jain, P. Jain, V. Jhansi, S. Kawakami, H. Kojima, S. Mahapatra, P. Mohanty, S. Morris, P. K. Nayak, A. Oshima, D. Pattanaik, P. Rakshe, K. Ramesh, B. Rao, L. V. Reddy, S. Shibata, F. Varsi, M. Zuberi","doi":"10.22323/1.358.0216","DOIUrl":"https://doi.org/10.22323/1.358.0216","url":null,"abstract":"The GRAPES-3 (Gamma Ray Astronomy at PeV EnergieS-3) experiment has been \u0000designed to study the composition and energy spectrum of primary cosmic rays \u0000(PCRs) over TeV - PeV range. It is equipped with 400 plastic scintillators \u0000covering an area of 25000 m$^2$ and a muon detector spread in an area of \u0000560 m$^2$. The precise measurement of particle densities from each detector \u0000is very important for any air shower experiment. Photo-multiplier tubes (PMT) \u0000are widely used as a transducer to collect the light produced in detector \u0000medium to electric signals. These signals are then processed to measure the \u0000particle densities. However, these PMTs tend to show non-linearity and \u0000saturation at higher signals due to the large shower core landing near the \u0000detector. The GRAPES-3 detectors record $sim$ (50 -70) particles in the \u0000linear range. This results in improper shower size estimation near the knee \u0000energy. In order to overcome this situation and to estimate the correct shower \u0000size, a systematic approach has been devised and demonstrated to correct the \u0000particle density beyond the linear range. It is seen from the method allows us \u0000to estimate particle densities $sim$ (500 - 800) which can improve the \u0000measurements beyond knee.","PeriodicalId":166008,"journal":{"name":"Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126580181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Neutrino direction and energy resolution of Askaryan detectors 阿斯卡良探测器的中微子方向和能量分辨率

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) Pub Date : 2019-09-02 DOI: 10.22323/1.358.0899

C. Glaser

引用次数: 14

Origin of ultra-high energy cosmic rays:The cosmological manifesto 超高能量宇宙射线的起源:宇宙学宣言

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) Pub Date : 2019-09-01 DOI: 10.22323/1.358.0397

J. A. Z. A. Institute, V. U. Brussel, Department of AstrophysicsIMAPP, R. Nijmegen

{"title":"Origin of ultra-high energy cosmic rays:The cosmological manifesto","authors":"J. A. Z. A. Institute, V. U. Brussel, Department of AstrophysicsIMAPP, R. Nijmegen","doi":"10.22323/1.358.0397","DOIUrl":"https://doi.org/10.22323/1.358.0397","url":null,"abstract":"A spectre is haunting physics—the spectre of non-thermal processes. Manifesting itself in astroparticle physics, all classical disciplines of physics and astronomy have entered into a holy alliance to exorcise this spectre: While astronomers try to destroy it with ignorance, convinced that only thermal processes are of importance to the dynamics of the Universe, particle physicists obscure it in the clouds of mystified admiration, simply because the Universe works on energy scales which are far above of their own technical and economical capabilities. It is high time to understand the energy scales of astroparticle physics in those of the Universe itself, by linking the existence of their basic essence, cosmic rays, via a universal mechanism to the ground reservoir of all non-thermal energy, gravitation. By this we meet the nursery tale of the enigmatic, mysterious sources of cosmic rays with a set of numbers naturally derived from cosmological parameters, which manifest themselves in a large range of astrophysical objects that stand in rank and file along a diagonal in the famous Hillas-plot, and in fact only have in common that they efficiently convert gravitational energy. While this manifesto, promoting the cosmological revolution in astroparticle physics, does not release us from detailed modelling of cosmic ray and multimessenger sources in order to understand all the details delivered by current experiments, it does help to clear up our view on the problem and to avoid some common fallacies and misconceptions.","PeriodicalId":166008,"journal":{"name":"Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131152626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A parameterized catalog of radio galaxies asultra-high energy cosmic ray sources 作为超高能量宇宙射线源的射电星系的参数化目录

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019) Pub Date : 2019-08-31 DOI: 10.22323/1.358.0396

J. Rachen, Bjorn Eichmann Astrophysical Institute, V. U. Brussel, R. Center, Ruhr-Universitát Bochum

{"title":"A parameterized catalog of radio galaxies asultra-high energy cosmic ray sources","authors":"J. Rachen, Bjorn Eichmann Astrophysical Institute, V. U. Brussel, R. Center, Ruhr-Universitát Bochum","doi":"10.22323/1.358.0396","DOIUrl":"https://doi.org/10.22323/1.358.0396","url":null,"abstract":"Many attempts have been made to provide catalogs of potential sources of ultra-high energy cosmic ray (UHECR) particles based on various astronomical tracers, such as observed radio or gamma-ray emission. A closer look reveals, however, that they all suffer from significant bias and selection effects. We present here a demo-version of a catalog for one often-discussed UHECR source class, radio galaxies (or radio-loud AGN), which is based on a complete theoretical description of jet-energetics, particle acceleration physics, relativistic beaming effects and nuclear composition, parametrized by a comprehensible set of adjustable physical quantities. In addition to the bright radio galaxies Centaurus A, Virgo A, Fornax A and Cygnus A discussed in previous work, we find several sources with blazar-like properties that can contribute on a similar level if relativistic beaming effects are considered. We present a simple method to test the basic properties of the catalog for any choice of parameters (without the need to run expensive simulations), and find that in the canonical case the anisotropy signals expected from radio galaxies promise to be in good agreement with current observational findings. In particular, radio galaxies can reproduce almost exactly the direction of the dipole above 8 EeV detected by the Pierre Auger Observatory if we assume that extragalactic magnetic fields are strong (>1nG) only in structures, but very weak in voids. We plan to provide a completed and improved version of this catalog in electronic form, to be used in more detailed UHECR propagation simulations. For immediate applications, we suggest a complete set of 16 strong UHECR sources which can contribute to UHECR anisotropy on the level which can be currently probed by experiment, and note that 6 of them have not been considered in any previous studies.","PeriodicalId":166008,"journal":{"name":"Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133032018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4