scholarly journals Neutrinos from TXS 0506+056 prior to the 2017 gamma-ray flare

2019 ◽  
Vol 207 ◽  
pp. 02002
Author(s):  
Chad Finley
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Neutrino Emission ◽  
High Energy Neutrino ◽  
Neutrino Event ◽  
Energy Neutrino

On 2017 September 22, IceCube released a public alert announcing the detection of a well-reconstructed, high-energy neutrino event. Such alerts issued through the Extremely High Energy (EHE) alert stream occur roughly four times a year. Subsequent multimessenger follow-up identified that the event was coincident in direction and time with a gamma-ray flare from the blazar TXS 0506+056. This association prompted an archival analysis searching for additional neutrinos from the direction of TXS 0506+056 using 9.5 years of IceCube neutrino observations. An excess of neutrino events with respect to atmospheric backgrounds was found between September 2014 and March 2015. The analysis yields 3:5σ evidence for neutrino emission from the direction of TXS 0506+056, independent of and prior to the 2017 emission.

scholarly journals Flaring Rate Distribution of Gamma-Ray Blazars and Implications for High-Energy Neutrino Emission

2019 ◽  
Author(s):  
Kenji Yoshida ◽  
Maria Petropoulou ◽  
Meg Urry ◽  
Paolo Coppi ◽  
Charles Bailyn ◽  
...  
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Neutrino Emission ◽  
High Energy Neutrino ◽  
Rate Distribution ◽  
Energy Neutrino

scholarly journals Testing high energy neutrino emission from the Fermi Gamma-ray Space Telescope Large Area Telescope (4LAC) sources.

2021 ◽  
Author(s):  
Antonio Galván ◽  
Nissim Fraija ◽  
Edilberto Aguilar-Ruiz ◽  
Jagdish C. Joshi ◽  
Jose Antonio de Diego Onsurbe ◽  
...  
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Neutrino Emission ◽  
Large Area ◽  
High Energy Neutrino ◽  
Space Telescope ◽  
Energy Neutrino

scholarly journals Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert

Science ◽  
2018 ◽  
Vol 361 (6398) ◽  
pp. 147-151 ◽  
Author(s):  
◽  
Mark Aartsen ◽  
Markus Ackermann ◽  
Jenni Adams ◽  
Juan Antonio Aguilar ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Neutrino Flux ◽  
High Energy ◽  
Time Variable ◽  
Neutrino Emission ◽  
High Energy Neutrino ◽  
Excess Emission ◽  
Energy Neutrino ◽  
Variable Flux ◽  
Astrophysical Neutrino

A high-energy neutrino event detected by IceCube on 22 September 2017 was coincident in direction and time with a gamma-ray flare from the blazar TXS 0506+056. Prompted by this association, we investigated 9.5 years of IceCube neutrino observations to search for excess emission at the position of the blazar. We found an excess of high-energy neutrino events, with respect to atmospheric backgrounds, at that position between September 2014 and March 2015. Allowing for time-variable flux, this constitutes 3.5σ evidence for neutrino emission from the direction of TXS 0506+056, independent of and prior to the 2017 flaring episode. This suggests that blazars are identifiable sources of the high-energy astrophysical neutrino flux.

scholarly journals Searching for Optical Counterparts to High-Energy Neutrino Sources with the Zwicky Transient Facility

2019 ◽  
Vol 207 ◽  
pp. 03001 ◽  
Author(s):  
Ludwig Rauch
Keyword(s):  
Active Galactic Nuclei ◽  
Gamma Ray ◽  
Galactic Nuclei ◽  
High Energy ◽  
Correlation Study ◽  
High Energy Neutrino ◽  
Energy Neutrino ◽  
Ice Cube ◽  
Sky Survey ◽  
High Cadence

The IceCube neutrino observatory has discovered a flux of extragalactic neutrinos. However, the origin of these neutrinos is still unknown. Among the possible candidates are Gamma-Ray Bursts (GRBs), Core-Collapse Supernovae (SNe), Active Galactic Nuclei (AGN) and Tidal Disruption Events (TDEs) - all are accompanied by a characteristic optical counterpart. The goal of this study is thus to identify the neutrino sources by detecting their optical counterparts with the Zwicky Transient Facility (ZTF). ZTF features a high cadence northern-sky survey enabling realtime correlation of optical transients with high-energy neutrino candidates. In this talk I will highlight the multimessenger potential of ZTF for an online neutrino correlation study with Ice- Cube.

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