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Despite objective difficulties, DLNP JINR scientists took a decisive part in the installation of the first 60 kg of detectors of enriched Ge-76 in the LEGEND setup located at the Gran Sasso National Laboratory (Italy). In addition to the direct assembling of detector strings, our specialists fabricated high-purity nylon mini-shrouds used to reduce the radioactive background of the experiment and for the first time performed the installation of the complete liquid argon instrumentation, developed and created by a joint team of scientists from JINR and the Technical University of Munich.

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Read in the November issue of the Global Neutrino Network bulletin how new detection units were deployed on the ORCA site in the Mediterranean Sea and about prospects of the development of the IceCube upgrade projects. Also, you will find here summaries of recently published interesting papers in astrophysics.

The current GNN Monthly issue.

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The Daya Bay Reactor Neutrino Experiment has produced the most precise measurement yet of θ₁₃, a key parameter for understanding how neutrinos change their “flavor”.

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The Neutrino Telescope at Lake Baikal has detected a signal from a radio blazar flare


On 8 December 2021, scientists from the IceCube Neutrino Observatory at the South Pole announced the observation of a track, a candidate for the astrophysical neutrino with an estimated energy of about 172 TeV. One of the brightest radio blazars in the sky, PKS 0735+17, is located in the region where the neutrino was presumably born (considering the direction of the incoming particle). The event stands out since this is the most powerful radio blazar flare in the gamma and visible ranges in the entire history of observations of this blazer. Also, its X-ray brightness increased, and the radio burst started. The coincidence between neutrino detection time and such a powerful blazar flare is the second one in the entire history of IceCube observations.  

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“It has long been known that there are ultrahigh-energy neutrinos coming to us from space. However, it is the first time we have succeeded in linking them to galactic nuclei, blazars”, Valery Rubakov, the chief researcher of the Institute for Nuclear Research of the Russian Academy of Sciences (INR of RAS), academician of RAS, talked about the main results of the project “Neutrino and particle astrophysics”.

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Find in a new GNN Monthly issue information about how the Baikal-GVD collaboration is preparing for the winter expedition to construct the underwater neutrino telescope, how the Radio Neutrino Observatory (RNO-G) was deployed in the ice of Greenland, about the facility structure and scientific objectives, and even more news from the life of large neutrino telescope collaborations.

The current GNN Monthly issue.

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From this issue you will learn how the ANTARES facility was put out of service, in which way the 2022 winterover team gathered at the South Pole, which tasks were performed on the deep-underwater platform of KM3NeT/ORCA during sea operations, and also, you will find the summary of papers on neutrino astronomy here.

The current GNN Monthly issue

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On 19 October 2021, at 15:46, a milestone event for the ATLAS collaboration happened after an almost three-year upgrade break ― the first collision events between proton beams and collimators were recorded during the planned testing of the detector and the accelerator in preparation for the 2022 restart.

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The new GNN Monthly issue goes into details about the detection of events that can be candidates for astrophysical neutrinos from the blazar PKS 0735+17 and about the plans of the GNN partners for the year 2022, and also presents summaries of recently published papers on neutrino astronomy.

The current GNN Monthly issue

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You can learn from the September issue of the News from Large Neutrino Telescopes about the deployment of the KM3NeT telescope in the Mediterranean Sea (account is accompanied by colourful photographs), about upgrade plans of the IceCube observatory and about other events in which the Global Neutrino Network (GNN) collaborations took part. You can also read the summary of publications about studies performed in the field of multimessenger astronomy.

The current issue of the GNN news