Matti Jansson - Academia.edu (original) (raw)

Papers by Matti Jansson

Research paper thumbnail of Detection of a particle shower at the Glashow resonance with IceCube

Research paper thumbnail of Measurement of Astrophysical Tau Neutrinos in IceCube's High-Energy Starting Events

Cornell University - arXiv, Nov 6, 2020

Research paper thumbnail of Search for sub-TeV neutrino emission from transient sources with three years of IceCube data

arXiv: High Energy Astrophysical Phenomena, 2020

Since the discovery of a flux of high-energy astrophysical neutrinos, searches for their origins ... more Since the discovery of a flux of high-energy astrophysical neutrinos, searches for their origins have focused primarily at TeV-PeV energies. Compared to sub-TeV searches, high-energy searches benefit from an increase in the neutrino cross section, improved angular resolution on the neutrino direction, and a reduced background from atmospheric neutrinos and muons. However, the focus on high energy does not preclude the existence of sub-TeV neutrino emission where IceCube retains sensitivity. Here we present the first all-flavor search from IceCube for transient emission of low-energy neutrinos, between 1-100 GeV using three years of data obtained with the IceCube-DeepCore detector. We find no evidence of transient neutrino emission in the data, thus leading to a constraint on the volumetric rate of astrophysical transient sources in the range of sim705−2301,textGpc−3,textyr−1\sim 705-2301\, \text{Gpc}^{-3}\, \text{yr}^{-1}sim705−2301,textGpc−3,textyr−1 for sources following a subphotospheric energy spectrum with a mean energy of 100 GeV and...

Research paper thumbnail of IceCube Data for Neutrino Point-Source Searches Years 2008-2018

R. Abbasi, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, C. Alispach, N. M. Amin, ... more R. Abbasi, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, C. Alispach, N. M. Amin, K. Andeen, T. Anderson, I. Ansseau, G. Anton, C. Argüelles, S. Axani, X. Bai, A. Balagopal V., A. Barbano, S. W. Barwick, B. Bastian, V. Basu, V. Baum, S. Baur, R. Bay, J. J. Beatty, 21 K.-H. Becker, J. Becker Tjus, C. Bellenghi, S. BenZvi, D. Berley, E. Bernardini, ∗ D. Z. Besson, † G. Binder, 9 D. Bindig, E. Blaufuss, S. Blot, C. Bohm, S. Böser, O. Botner, J. Böttcher, E. Bourbeau, J. Bourbeau, F. Bradascio, J. Braun, S. Bron, J. Brostean-Kaiser, A. Burgman, J. Buscher, R. S. Busse, M. A. Campana, T. Carver, C. Chen, E. Cheung, D. Chirkin, S. Choi, B. A. Clark, K. Clark, L. Classen, A. Coleman, G. H. Collin, J. M. Conrad, P. Coppin, P. Correa, D. F. Cowen, 54 R. Cross, P. Dave, C. De Clercq, J. J. DeLaunay, H. Dembinski, K. Deoskar, S. De Ridder, A. Desai, P. Desiati, K. D. de Vries, G. de Wasseige, M. de With, T. DeYoung, S. Dharani, A. Diaz, J. C. Dı́az-Vélez, H. Dujmovic, M. Dunkman...

Research paper thumbnail of Searching for Dark Matter from the Sun with the IceCube Detector

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of A Search for Time-dependent Astrophysical Neutrino Emission with IceCube Data from 2012 to 2017

The Astrophysical Journal, 2021

High-energy neutrinos are unique messengers of the high-energy universe, tracing the processes of... more High-energy neutrinos are unique messengers of the high-energy universe, tracing the processes of cosmic ray acceleration. This paper presents analyses focusing on time-dependent neutrino point-source searches. A scan of the whole sky, making no prior assumption about source candidates, is performed, looking for a space and time clustering of high-energy neutrinos in data collected by the IceCube Neutrino Observatory between 2012 and 2017. No statistically significant evidence for a time-dependent neutrino signal is found with this search during this period, as all results are consistent with the background expectation. Within this study period, the blazar 3C 279, showed strong variability, inducing a very prominent gamma-ray flare observed in 2015 June. This event motivated a dedicated study of the blazar, which consists of searching for a time-dependent neutrino signal correlated with the gamma-ray emission. No evidence for a time-dependent signal is found. Hence, an upper limit o...

Research paper thumbnail of Follow-up of Astrophysical Transients in Real Time with the IceCube Neutrino Observatory

The Astrophysical Journal, 2021

In multi-messenger astronomy, rapid investigation of interesting transients is imperative. As an ... more In multi-messenger astronomy, rapid investigation of interesting transients is imperative. As an observatory with a 4π steradian field of view, and ∼99% uptime, the IceCube Neutrino Observatory is a unique facility to follow up transients, as well as to provide valuable insights for other observatories and inform their observational decisions. Since 2016, IceCube has been using low-latency data to rapidly respond to interesting astrophysical events reported by the multi-messenger observational community. Here, we describe the pipeline used to perform these followup analyses, and provide a summary of the 58 analyses performed as of July 2020. We find no significant signal in the first 58 analyses performed. The pipeline has helped inform various electromagnetic observation strategies, and has constrained neutrino emission from potential hadronic cosmic accelerators.

Research paper thumbnail of Recent Progress in Solar Atmospheric Neutrino Searches with IceCube

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Towards Equitable, Diverse, and Inclusive science collaborations: The Multimessenger Diversity Network

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of A calibration study of local ice and optical sensor properties in IceCube

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Design of an Efficient, High-Throughput Photomultiplier Tube Testing Facility for the IceCube Upgrade

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Observation of Cosmic Ray Anisotropy with Nine Years of IceCube Data

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Studies of systematic uncertainty effects on IceCube's real-time angular uncertainty

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of A New Search for Neutrino Point Sources with IceCube

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Simulation study for the future IceCube-Gen2 surface array

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Discrimination of Muons for Mass Composition Studies of Inclined Air Showers Detected with IceTop

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of A Time-Variability Test for Candidate Neutrino Sources Observed with IceCube

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Direction Reconstruction using a CNN for GeV-Scale Neutrinos in IceCube

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Design of a Robust Fiber Optic Communications System for Future IceCube Detectors

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of A Search for Neutrinos from Decaying Dark Matter in Galaxy Clusters and Galaxies with IceCube

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Detection of a particle shower at the Glashow resonance with IceCube

Research paper thumbnail of Measurement of Astrophysical Tau Neutrinos in IceCube's High-Energy Starting Events

Cornell University - arXiv, Nov 6, 2020

Research paper thumbnail of Search for sub-TeV neutrino emission from transient sources with three years of IceCube data

arXiv: High Energy Astrophysical Phenomena, 2020

Since the discovery of a flux of high-energy astrophysical neutrinos, searches for their origins ... more Since the discovery of a flux of high-energy astrophysical neutrinos, searches for their origins have focused primarily at TeV-PeV energies. Compared to sub-TeV searches, high-energy searches benefit from an increase in the neutrino cross section, improved angular resolution on the neutrino direction, and a reduced background from atmospheric neutrinos and muons. However, the focus on high energy does not preclude the existence of sub-TeV neutrino emission where IceCube retains sensitivity. Here we present the first all-flavor search from IceCube for transient emission of low-energy neutrinos, between 1-100 GeV using three years of data obtained with the IceCube-DeepCore detector. We find no evidence of transient neutrino emission in the data, thus leading to a constraint on the volumetric rate of astrophysical transient sources in the range of sim705−2301,textGpc−3,textyr−1\sim 705-2301\, \text{Gpc}^{-3}\, \text{yr}^{-1}sim705−2301,textGpc−3,textyr−1 for sources following a subphotospheric energy spectrum with a mean energy of 100 GeV and...

Research paper thumbnail of IceCube Data for Neutrino Point-Source Searches Years 2008-2018

R. Abbasi, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, C. Alispach, N. M. Amin, ... more R. Abbasi, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, C. Alispach, N. M. Amin, K. Andeen, T. Anderson, I. Ansseau, G. Anton, C. Argüelles, S. Axani, X. Bai, A. Balagopal V., A. Barbano, S. W. Barwick, B. Bastian, V. Basu, V. Baum, S. Baur, R. Bay, J. J. Beatty, 21 K.-H. Becker, J. Becker Tjus, C. Bellenghi, S. BenZvi, D. Berley, E. Bernardini, ∗ D. Z. Besson, † G. Binder, 9 D. Bindig, E. Blaufuss, S. Blot, C. Bohm, S. Böser, O. Botner, J. Böttcher, E. Bourbeau, J. Bourbeau, F. Bradascio, J. Braun, S. Bron, J. Brostean-Kaiser, A. Burgman, J. Buscher, R. S. Busse, M. A. Campana, T. Carver, C. Chen, E. Cheung, D. Chirkin, S. Choi, B. A. Clark, K. Clark, L. Classen, A. Coleman, G. H. Collin, J. M. Conrad, P. Coppin, P. Correa, D. F. Cowen, 54 R. Cross, P. Dave, C. De Clercq, J. J. DeLaunay, H. Dembinski, K. Deoskar, S. De Ridder, A. Desai, P. Desiati, K. D. de Vries, G. de Wasseige, M. de With, T. DeYoung, S. Dharani, A. Diaz, J. C. Dı́az-Vélez, H. Dujmovic, M. Dunkman...

Research paper thumbnail of Searching for Dark Matter from the Sun with the IceCube Detector

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of A Search for Time-dependent Astrophysical Neutrino Emission with IceCube Data from 2012 to 2017

The Astrophysical Journal, 2021

High-energy neutrinos are unique messengers of the high-energy universe, tracing the processes of... more High-energy neutrinos are unique messengers of the high-energy universe, tracing the processes of cosmic ray acceleration. This paper presents analyses focusing on time-dependent neutrino point-source searches. A scan of the whole sky, making no prior assumption about source candidates, is performed, looking for a space and time clustering of high-energy neutrinos in data collected by the IceCube Neutrino Observatory between 2012 and 2017. No statistically significant evidence for a time-dependent neutrino signal is found with this search during this period, as all results are consistent with the background expectation. Within this study period, the blazar 3C 279, showed strong variability, inducing a very prominent gamma-ray flare observed in 2015 June. This event motivated a dedicated study of the blazar, which consists of searching for a time-dependent neutrino signal correlated with the gamma-ray emission. No evidence for a time-dependent signal is found. Hence, an upper limit o...

Research paper thumbnail of Follow-up of Astrophysical Transients in Real Time with the IceCube Neutrino Observatory

The Astrophysical Journal, 2021

In multi-messenger astronomy, rapid investigation of interesting transients is imperative. As an ... more In multi-messenger astronomy, rapid investigation of interesting transients is imperative. As an observatory with a 4π steradian field of view, and ∼99% uptime, the IceCube Neutrino Observatory is a unique facility to follow up transients, as well as to provide valuable insights for other observatories and inform their observational decisions. Since 2016, IceCube has been using low-latency data to rapidly respond to interesting astrophysical events reported by the multi-messenger observational community. Here, we describe the pipeline used to perform these followup analyses, and provide a summary of the 58 analyses performed as of July 2020. We find no significant signal in the first 58 analyses performed. The pipeline has helped inform various electromagnetic observation strategies, and has constrained neutrino emission from potential hadronic cosmic accelerators.

Research paper thumbnail of Recent Progress in Solar Atmospheric Neutrino Searches with IceCube

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Towards Equitable, Diverse, and Inclusive science collaborations: The Multimessenger Diversity Network

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of A calibration study of local ice and optical sensor properties in IceCube

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Design of an Efficient, High-Throughput Photomultiplier Tube Testing Facility for the IceCube Upgrade

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Observation of Cosmic Ray Anisotropy with Nine Years of IceCube Data

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Studies of systematic uncertainty effects on IceCube's real-time angular uncertainty

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of A New Search for Neutrino Point Sources with IceCube

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Simulation study for the future IceCube-Gen2 surface array

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Discrimination of Muons for Mass Composition Studies of Inclined Air Showers Detected with IceTop

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of A Time-Variability Test for Candidate Neutrino Sources Observed with IceCube

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Direction Reconstruction using a CNN for GeV-Scale Neutrinos in IceCube

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of Design of a Robust Fiber Optic Communications System for Future IceCube Detectors

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021

Research paper thumbnail of A Search for Neutrinos from Decaying Dark Matter in Galaxy Clusters and Galaxies with IceCube

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021), 2021