L. Otiniano, M. Suárez-Durán, C. Sarmiento-Cano, Hernán Asorey, I. Sidelnik
Comisión Nacional de Investigación y Desarrollo Aeroespacial, CONIDA, Lima, Perú Universidad de Pamplona, Departamento de Física y Geología Pamplona, Colombia Université Libre de Bruxelles Brussels, Belgium. Instituto de Tecnologías en Detección y Astropartículas (ITeDA, CNEA/CONICET/UNSAM) Centro Atómico Constituyentes, Av. General Paz 1499, 1450 Villa Maipú, Buenos Aires, Argentina Departamento de Física de Neutrones, Centro Atómico Bariloche (CNEA/CONICET) Av. Bustillo 9500, 8400 San Carlos de Bariloche, Argentina E-mail: lotiniano@conida.gob.pe
国家航空航天研究和发展委员会，CONIDA，利马，秘鲁潘普洛纳大学，物理和地质系，哥伦比亚潘普洛纳universite Libre de Bruxelles，比利时布鲁塞尔。在检测技术研究和天体粒子(ITeDA、评/ / UNSAM)一般原子成分,av中心和平1499,Villa Maipú1450年,布宜诺斯艾利斯,阿根廷中子物理学系,原子巴里洛切(评鉴中心/国家)av Bustillo 9500, 8400圣卡洛斯阿根廷巴里洛切,电子邮件:lotiniano@conida.gob.pe
{"title":"Simultaneous particles influence on the LAGO’s Water Cherenkov Detectors signals","authors":"L. Otiniano, M. Suárez-Durán, C. Sarmiento-Cano, Hernán Asorey, I. Sidelnik","doi":"10.22323/1.395.0267","DOIUrl":"https://doi.org/10.22323/1.395.0267","url":null,"abstract":"Comisión Nacional de Investigación y Desarrollo Aeroespacial, CONIDA, Lima, Perú Universidad de Pamplona, Departamento de Física y Geología Pamplona, Colombia Université Libre de Bruxelles Brussels, Belgium. Instituto de Tecnologías en Detección y Astropartículas (ITeDA, CNEA/CONICET/UNSAM) Centro Atómico Constituyentes, Av. General Paz 1499, 1450 Villa Maipú, Buenos Aires, Argentina Departamento de Física de Neutrones, Centro Atómico Bariloche (CNEA/CONICET) Av. Bustillo 9500, 8400 San Carlos de Bariloche, Argentina E-mail: lotiniano@conida.gob.pe","PeriodicalId":20473,"journal":{"name":"Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91351830","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}
Andrew Wang, Chaoxian Lin, N. Otte, M. Doro, E. Gazda, I. Taboada, A. Brown, M. Bagheri
The neutrino band above 10 PeV remains one of the last multi-messenger windows to be opened, a challenge that several groups tackle. One of the proposed instruments is Trinity, a system of air-shower imaging telescopes to detect Earth-skimming neutrinos with energies from 106 GeV to 1010 GeV. We present updated sensitivity calculations demonstrating Trinity’s capability of not only detecting the IceCube measured diffuse astrophysical neutrino flux but doing so in an energy band that overlaps with IceCube’s. Trinity will distinguish between different cutoff scenarios of the astrophysical neutrino flux, which will help identify their sources. We also discuss Trinity’s sensitivity to transient sources on timescales from hours to years.
{"title":"Trinity’s Sensitivity to Isotropic and Point-Source Neutrinos","authors":"Andrew Wang, Chaoxian Lin, N. Otte, M. Doro, E. Gazda, I. Taboada, A. Brown, M. Bagheri","doi":"10.22323/1.395.1234","DOIUrl":"https://doi.org/10.22323/1.395.1234","url":null,"abstract":"The neutrino band above 10 PeV remains one of the last multi-messenger windows to be opened, a challenge that several groups tackle. One of the proposed instruments is Trinity, a system of air-shower imaging telescopes to detect Earth-skimming neutrinos with energies from 106 GeV to 1010 GeV. We present updated sensitivity calculations demonstrating Trinity’s capability of not only detecting the IceCube measured diffuse astrophysical neutrino flux but doing so in an energy band that overlaps with IceCube’s. Trinity will distinguish between different cutoff scenarios of the astrophysical neutrino flux, which will help identify their sources. We also discuss Trinity’s sensitivity to transient sources on timescales from hours to years.","PeriodicalId":20473,"journal":{"name":"Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79208606","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}
{"title":"IPPOG Global Cosmic Rays Portal: Making Cosmic Rays Studies available to schools worldwide","authors":"Barbora Bruant Gulejova","doi":"10.22323/1.395.1362","DOIUrl":"https://doi.org/10.22323/1.395.1362","url":null,"abstract":"","PeriodicalId":20473,"journal":{"name":"Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87016200","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}
A. Ruina, M. Stolpovskiy, M. Deliyergiyev, Yuanhao Cui, Francesco Alemanno, Q. An, P. Azzarello, F. Barbato, P. Bernardini, X. Bi, M. Cai, E. Casilli, E. Catanzani, Jin Chang, Dengyi Chen, Junling Chen, Zhan-Fang Chen, M. Cui, T. Cui, H. Dai, A. De Benedittis, I. De Mitri, F. de Palma, M. Di Santo, Qi Ding, T. Dong, Z. Dong, G. Donvito, D. Droz, J. Duan, K. Duan, D. Durso, R. Fan, Yizhong Fan, F. Fang, K. Fang, C. Feng, Lei Feng, P. Fusco, V. Gallo, M. Gao, F. Gargano, Ke Gong, Y. Gong, D. Guo, Jianhua Guo, Shuang Han, Yi-Ming Hu, Guangshun Huang, Xiaoyuan Huang, Y. Huang, M. Ionica, Wei Jiang, J. Kong, A. Kotenko, D. Kyratzis, S. Lei, Wei Li, Wen Li, Xiang Li, X. Li, Y. Liang, Chengming Liu, Hao Liu, Jie Liu, Shu Liu, Yang Liu, F. Loparco, C. Luo, Miao Ma, P. Ma, T. Ma, Xiao Ma, G. Marsella, M. Mazziotta, D. Mo, X. Niu, Xu Pan, A. Parenti, W. Peng, X. Peng, C. Perrina, Rui Qiao, J. Rao, A. Ruina, M. Salinas, G. Shang, Weiming Shen, Z. Shen, Z. Shen, L. Silveri, Jing Song, H. Su, M. Su, H. Sun, Zhiyu Sun,
Arshia Ruina,a,∗ Mikhail Stolpovskiy,a Maksym Deliyergiyeva and Yuxing Cuib on behalf of the DAMPE Collaboration (a complete list of authors can be found at the end of the proceedings) aDépartement de physique nucléaire et corpusculaire, University of Geneva, Quai Ernest-Ansermet 24, 1205 Geneva, Switzerland bKey Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033, China E-mail: arshia.ruina@unige.ch, mikhail.stolpovskiy@unige.ch,
{"title":"Charge Loss Correction in the Silicon-Tungsten Tracker-Converter for Proton-Helium Charge Identification in the DAMPE Detector","authors":"A. Ruina, M. Stolpovskiy, M. Deliyergiyev, Yuanhao Cui, Francesco Alemanno, Q. An, P. Azzarello, F. Barbato, P. Bernardini, X. Bi, M. Cai, E. Casilli, E. Catanzani, Jin Chang, Dengyi Chen, Junling Chen, Zhan-Fang Chen, M. Cui, T. Cui, H. Dai, A. De Benedittis, I. De Mitri, F. de Palma, M. Di Santo, Qi Ding, T. Dong, Z. Dong, G. Donvito, D. Droz, J. Duan, K. Duan, D. Durso, R. Fan, Yizhong Fan, F. Fang, K. Fang, C. Feng, Lei Feng, P. Fusco, V. Gallo, M. Gao, F. Gargano, Ke Gong, Y. Gong, D. Guo, Jianhua Guo, Shuang Han, Yi-Ming Hu, Guangshun Huang, Xiaoyuan Huang, Y. Huang, M. Ionica, Wei Jiang, J. Kong, A. Kotenko, D. Kyratzis, S. Lei, Wei Li, Wen Li, Xiang Li, X. Li, Y. Liang, Chengming Liu, Hao Liu, Jie Liu, Shu Liu, Yang Liu, F. Loparco, C. Luo, Miao Ma, P. Ma, T. Ma, Xiao Ma, G. Marsella, M. Mazziotta, D. Mo, X. Niu, Xu Pan, A. Parenti, W. Peng, X. Peng, C. Perrina, Rui Qiao, J. Rao, A. Ruina, M. Salinas, G. Shang, Weiming Shen, Z. Shen, Z. Shen, L. Silveri, Jing Song, H. Su, M. Su, H. Sun, Zhiyu Sun,","doi":"10.22323/1.395.0083","DOIUrl":"https://doi.org/10.22323/1.395.0083","url":null,"abstract":"Arshia Ruina,a,∗ Mikhail Stolpovskiy,a Maksym Deliyergiyeva and Yuxing Cuib on behalf of the DAMPE Collaboration (a complete list of authors can be found at the end of the proceedings) aDépartement de physique nucléaire et corpusculaire, University of Geneva, Quai Ernest-Ansermet 24, 1205 Geneva, Switzerland bKey Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033, China E-mail: arshia.ruina@unige.ch, mikhail.stolpovskiy@unige.ch,","PeriodicalId":20473,"journal":{"name":"Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80997196","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}
C. Adams, I. Bartos, K. Corley, S. M'arka, Z. Márka, D. Veske, M. Capasso, Rene A. Ong, I. Sadeh, P. Kaaret, Weidong Jin, W. Benbow, R. Mukherjee, R. Prado, M. Lundy, Sameer Patel, P. Moriarty, Gernot Maier, A. Furniss, K. Ragan, David Williams, J. Buckley, L. Fortson, J. Quinn, J. Holder, C. Giuri, E. Pueschel, Daniel Nieto, S. O’Brien, Deivid Ribeiro, K. Pfrang, O. Gueta, G. Foote, A. Weinstein, Sajan Kumar, Tyler Williamson, D. Tak, Conor McGrath, T. Kleiner, M. Pohl, Paul Reynolds, B. Hona, D. Hanna, M. Santander, G. Sembroski, S. R. Patel, M. Errando, M. Kertzman, O. Hervet, Mireia Nievas-Rosillo, Mark Lang, E. Roache, T. Humensky, R. Shang, V. Vassiliev, A. Chromey, A. Falcone, J. Christiansen, A. Otte, A. Gent, A. Brill, J. Ryan, Kayla Farrell, G. Gillanders, Qi Feng, A. Archer, D. Kieda
The recent discovery of electromagnetic signals in coincidence with gravitational waves from neutron-star mergers has solidified the importance of multimessenger campaigns for studying the most energetic astrophysical events. Pioneering multimessenger observatories, such as the LIGO/Virgo gravitational wave detectors and the IceCube neutrino observatory, record many candidate signals that fall short of the detection significance threshold. These sub-threshold event candidates are promising targets for multimessenger studies, as the information provided by these candidates may, when combined with time-coincident gamma-ray observations, lead to significant detections. In this contribution, I describe our use of sub-threshold binary neutron star merger candidates identified in Advanced LIGO's first observing run (O1) to search for transient events in very-high-energy gamma rays using archival observations from the VERITAS imaging atmospheric Cherenkov telescope array. I describe the promise of this technique for future joint sub-threshold searches.
{"title":"An Archival Search for Very-High-Energy Counterparts to Sub-Threshold Neutron-Star Merger Candidates","authors":"C. Adams, I. Bartos, K. Corley, S. M'arka, Z. Márka, D. Veske, M. Capasso, Rene A. Ong, I. Sadeh, P. Kaaret, Weidong Jin, W. Benbow, R. Mukherjee, R. Prado, M. Lundy, Sameer Patel, P. Moriarty, Gernot Maier, A. Furniss, K. Ragan, David Williams, J. Buckley, L. Fortson, J. Quinn, J. Holder, C. Giuri, E. Pueschel, Daniel Nieto, S. O’Brien, Deivid Ribeiro, K. Pfrang, O. Gueta, G. Foote, A. Weinstein, Sajan Kumar, Tyler Williamson, D. Tak, Conor McGrath, T. Kleiner, M. Pohl, Paul Reynolds, B. Hona, D. Hanna, M. Santander, G. Sembroski, S. R. Patel, M. Errando, M. Kertzman, O. Hervet, Mireia Nievas-Rosillo, Mark Lang, E. Roache, T. Humensky, R. Shang, V. Vassiliev, A. Chromey, A. Falcone, J. Christiansen, A. Otte, A. Gent, A. Brill, J. Ryan, Kayla Farrell, G. Gillanders, Qi Feng, A. Archer, D. Kieda","doi":"10.22323/1.395.0948","DOIUrl":"https://doi.org/10.22323/1.395.0948","url":null,"abstract":"The recent discovery of electromagnetic signals in coincidence with gravitational waves from neutron-star mergers has solidified the importance of multimessenger campaigns for studying the most energetic astrophysical events. Pioneering multimessenger observatories, such as the LIGO/Virgo gravitational wave detectors and the IceCube neutrino observatory, record many candidate signals that fall short of the detection significance threshold. These sub-threshold event candidates are promising targets for multimessenger studies, as the information provided by these candidates may, when combined with time-coincident gamma-ray observations, lead to significant detections. In this contribution, I describe our use of sub-threshold binary neutron star merger candidates identified in Advanced LIGO's first observing run (O1) to search for transient events in very-high-energy gamma rays using archival observations from the VERITAS imaging atmospheric Cherenkov telescope array. I describe the promise of this technique for future joint sub-threshold searches.","PeriodicalId":20473,"journal":{"name":"Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91406202","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}
A. Williamson, C. James, S. Tingay, J. Bray, T. Huege
Curtin University, International Centre for Radio Astronomy Research, Bentley, WA 6102, Australia, University of Manchester, JBCA, Dept. of Physics & Astronomy, Manchester M13 9PL, UK, Karlsruhe Institute of Technology, Institute for Astroparticle Physics (IAP), P.O. Box 3640, 76021 Karlsruhe, Germany Astrophysical Institute, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium E-mail: alexander.williamson1@postgrad.curtin.edu.au,
{"title":"Cosmic Ray Detection at the Murchison Radio-astronomy Observatory – a pathfinder for SKA-Low","authors":"A. Williamson, C. James, S. Tingay, J. Bray, T. Huege","doi":"10.22323/1.395.0325","DOIUrl":"https://doi.org/10.22323/1.395.0325","url":null,"abstract":"Curtin University, International Centre for Radio Astronomy Research, Bentley, WA 6102, Australia, University of Manchester, JBCA, Dept. of Physics & Astronomy, Manchester M13 9PL, UK, Karlsruhe Institute of Technology, Institute for Astroparticle Physics (IAP), P.O. Box 3640, 76021 Karlsruhe, Germany Astrophysical Institute, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium E-mail: alexander.williamson1@postgrad.curtin.edu.au,","PeriodicalId":20473,"journal":{"name":"Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80617263","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}
The CALorimetric Electron Telescope (CALET) was launched in August 2015 and installed on the International Space Station (ISS) Japanese Experiment Module Exposed Facility. Alongside the primary science targets of GeV—TeV energy cosmic-ray electrons and cosmic-ray hadrons up to PeV energies, CALET is sensitive to gamma rays from 1 GeV up to 10 TeV, limited by statistics. Access to energies below 10 GeV is enabled by a dedicated low-energy gamma (LE-𝛾 ) trigger which is active only at low geomagnetic latitudes. In this work we review the analysis of gamma-ray events collected with this trigger including the mitigation of a secondary photon background from cosmic-ray interactions with ISS structures in the CALET field-of-view, the observation of persistent galactic and extragalactic sources, and the detection of emission from the quiescent Sun.
{"title":"Low-energy gamma-ray observations above 1 GeV with CALET on the International Space Station","authors":"N. Cannady","doi":"10.22323/1.395.0604","DOIUrl":"https://doi.org/10.22323/1.395.0604","url":null,"abstract":"The CALorimetric Electron Telescope (CALET) was launched in August 2015 and installed on the International Space Station (ISS) Japanese Experiment Module Exposed Facility. Alongside the primary science targets of GeV—TeV energy cosmic-ray electrons and cosmic-ray hadrons up to PeV energies, CALET is sensitive to gamma rays from 1 GeV up to 10 TeV, limited by statistics. Access to energies below 10 GeV is enabled by a dedicated low-energy gamma (LE-𝛾 ) trigger which is active only at low geomagnetic latitudes. In this work we review the analysis of gamma-ray events collected with this trigger including the mitigation of a secondary photon background from cosmic-ray interactions with ISS structures in the CALET field-of-view, the observation of persistent galactic and extragalactic sources, and the detection of emission from the quiescent Sun.","PeriodicalId":20473,"journal":{"name":"Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74501428","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}
Interstellar clouds can act as target material for hadronic cosmic rays; gamma-rays produced through inelastic proton-proton collisions and spatially associated with the clouds provide a key indicator of efficient particle acceleration. However, even for PeVatron sources reaching PeV energies, the system of cloud and accelerator must fulfil several conditions in order to produce a detectable gamma-ray flux. In this contribution, we characterise the necessary properties of both cloud and accelerator. Using available Supernova Remnant (SNR) and interstellar cloud catalogues, and assuming particle acceleration to PeV energies in a nearby SNR, we produce a ranked shortlist of the most promising target systems; those for which a detectable gamma-ray flux is predicted. We discuss detection prospects for future facilities including CTA and SWGO; and compare our predictions with known gamma-ray sources, including the Ultra-High-Energy sources recently detected by LHAASO. A range of model scenarios are tested, including variation in the diffusion coefficient and particle spectrum, under which the best candidate clouds in our shortlist are consistently bright. On average, a detectable gamma-ray flux is more likely for more massive clouds; for systems with lower separation distance between the SNR and cloud; and for slightly older SNRs, due to the time required for particles to traverse the separation distance.
{"title":"Predictions for gamma-rays from clouds associated with supernova remnant PeVatrons","authors":"A. Mitchell, G. Rowell, S. Celli, S. Einecke","doi":"10.22323/1.395.0922","DOIUrl":"https://doi.org/10.22323/1.395.0922","url":null,"abstract":"Interstellar clouds can act as target material for hadronic cosmic rays; gamma-rays produced through inelastic proton-proton collisions and spatially associated with the clouds provide a key indicator of efficient particle acceleration. However, even for PeVatron sources reaching PeV energies, the system of cloud and accelerator must fulfil several conditions in order to produce a detectable gamma-ray flux. In this contribution, we characterise the necessary properties of both cloud and accelerator. Using available Supernova Remnant (SNR) and interstellar cloud catalogues, and assuming particle acceleration to PeV energies in a nearby SNR, we produce a ranked shortlist of the most promising target systems; those for which a detectable gamma-ray flux is predicted. We discuss detection prospects for future facilities including CTA and SWGO; and compare our predictions with known gamma-ray sources, including the Ultra-High-Energy sources recently detected by LHAASO. A range of model scenarios are tested, including variation in the diffusion coefficient and particle spectrum, under which the best candidate clouds in our shortlist are consistently bright. On average, a detectable gamma-ray flux is more likely for more massive clouds; for systems with lower separation distance between the SNR and cloud; and for slightly older SNRs, due to the time required for particles to traverse the separation distance.","PeriodicalId":20473,"journal":{"name":"Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86935182","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}
The CALorimetric Electron Telescope (CALET) has collected over 60 months of uninterrupted data on the flux and spectrum of the Ultra-Heavy (UH) cosmic rays from Z=30 to 40. Using the latest data provided from CALET’s UH trigger, we present a newly developed UH analysis complementary to the ongoing analysis presented at this conference by Zober et al. This work introduces a new Ultra-Heavy Analysis (UHA) dataset produced from CALET production data allowing for more streamlined analysis. We detail temporal and spatial correction algorithms using both the 26 Fe and 14 Si peaks to improve charge resolution in the Z >= 30 region. Additionally, this work presents a new method for removing the contributions from non-relativistic/lower-Z nuclei using trajectory tracing to compute effective cutoff rigidities in place of the previously used vertical Stoermer approximation. We show that replacing the approximated cutoffs with numerically calculated effective cutoff rigidities, calculated using the IGRF13 and T05 (Tsyganenko 05) geomagnetic field models, leads to fewer events being removed from the dataset while maintaining improved charge resolution for Z > 26. Furthermore, we introduce Tarle function peak fitting to perform charge corrections needed as a result of any quenching effects. We show the most recent CALET UH results incorporating these improvements in the analysis
{"title":"Ultra-Heavy Cosmic Ray Analysis with CALET on the International Space Station: Established and Developing Procedures","authors":"A. Ficklin, N. Cannady, B. Rauch, W. Zober","doi":"10.22323/1.395.0069","DOIUrl":"https://doi.org/10.22323/1.395.0069","url":null,"abstract":"The CALorimetric Electron Telescope (CALET) has collected over 60 months of uninterrupted data on the flux and spectrum of the Ultra-Heavy (UH) cosmic rays from Z=30 to 40. Using the latest data provided from CALET’s UH trigger, we present a newly developed UH analysis complementary to the ongoing analysis presented at this conference by Zober et al. This work introduces a new Ultra-Heavy Analysis (UHA) dataset produced from CALET production data allowing for more streamlined analysis. We detail temporal and spatial correction algorithms using both the 26 Fe and 14 Si peaks to improve charge resolution in the Z >= 30 region. Additionally, this work presents a new method for removing the contributions from non-relativistic/lower-Z nuclei using trajectory tracing to compute effective cutoff rigidities in place of the previously used vertical Stoermer approximation. We show that replacing the approximated cutoffs with numerically calculated effective cutoff rigidities, calculated using the IGRF13 and T05 (Tsyganenko 05) geomagnetic field models, leads to fewer events being removed from the dataset while maintaining improved charge resolution for Z > 26. Furthermore, we introduce Tarle function peak fitting to perform charge corrections needed as a result of any quenching effects. We show the most recent CALET UH results incorporating these improvements in the analysis","PeriodicalId":20473,"journal":{"name":"Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83355676","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}
Ł. Bibrzycki, L. Bibrzycki, D. Alvarez-Castillo, O. Bar, D. Góra, P. Homola, P. Kovács, M. Niedźwiecki, M. Piekarczyk, K. Rzecki, J. Stasielak, S. Stuglik, O. Sushchov, A. Tursunov, Credo
The wealth of smartphone data collected by the Cosmic Ray Extremely Distributed Observatory (CREDO) greatly surpasses the capabilities of manual analysis. So, efficient means of rejecting the non-cosmic-ray noise and identification of signals attributable to extensive air showers are necessary. To address these problemswe discuss a Convolutional Neural Network-basedmethod of artefact rejection and complementarymethod of particle identification based on common statistical classifiers aswell as their ensemble extensions. These approaches are based on supervised learning, so we need to provide a representative subset of the CREDO dataset for training and validation. According to this approach over 2300 images were chosen and manually labeled by 5 judges. The images were split into spot, track, worm (collectively named signals) and artefact classes. Then the preprocessing consisting of luminance summation of RGB channels (grayscaling) and background removal by adaptive thresholding was performed. For purposes of artefact rejection the binary CNN-based classifier was proposed which is able to distinguish between artefacts and signals. The classifier was fed with input data in the form of Daubechies wavelet transformed images. In the case of cosmic ray signal classification, the well-known feature-based classifiers were considered. As feature descriptors, we used Zernike moments with additional feature related to total image luminance. For the problem of artefact rejection, we obtained an accuracy of 99%. For the 4-class signal classification, the best performing classifiers achieved a recognition rate of 88%.
{"title":"Machine learning aided noise filtration and signal classification for CREDO experiment","authors":"Ł. Bibrzycki, L. Bibrzycki, D. Alvarez-Castillo, O. Bar, D. Góra, P. Homola, P. Kovács, M. Niedźwiecki, M. Piekarczyk, K. Rzecki, J. Stasielak, S. Stuglik, O. Sushchov, A. Tursunov, Credo","doi":"10.22323/1.395.0227","DOIUrl":"https://doi.org/10.22323/1.395.0227","url":null,"abstract":"The wealth of smartphone data collected by the Cosmic Ray Extremely Distributed Observatory (CREDO) greatly surpasses the capabilities of manual analysis. So, efficient means of rejecting the non-cosmic-ray noise and identification of signals attributable to extensive air showers are necessary. To address these problemswe discuss a Convolutional Neural Network-basedmethod of artefact rejection and complementarymethod of particle identification based on common statistical classifiers aswell as their ensemble extensions. These approaches are based on supervised learning, so we need to provide a representative subset of the CREDO dataset for training and validation. According to this approach over 2300 images were chosen and manually labeled by 5 judges. The images were split into spot, track, worm (collectively named signals) and artefact classes. Then the preprocessing consisting of luminance summation of RGB channels (grayscaling) and background removal by adaptive thresholding was performed. For purposes of artefact rejection the binary CNN-based classifier was proposed which is able to distinguish between artefacts and signals. The classifier was fed with input data in the form of Daubechies wavelet transformed images. In the case of cosmic ray signal classification, the well-known feature-based classifiers were considered. As feature descriptors, we used Zernike moments with additional feature related to total image luminance. For the problem of artefact rejection, we obtained an accuracy of 99%. For the 4-class signal classification, the best performing classifiers achieved a recognition rate of 88%.","PeriodicalId":20473,"journal":{"name":"Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82839489","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}
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