Baikal-GVD has been actively under construction since 2016 and continues to grow. The winter expedition of 2026 has brought its number of optical modules to 4900 and the nominal instrumented volume to 0.8 km$^3$. We briefly review the current detector status and some of its most recent results. We also discuss the currently achieved and expected sensitivity of Baikal-GVD physics analyses and...
We would like to present POLARIS, a new sparse radial detector concept for an underwater neutrino telescope, simulated using the Prometheus framework. The design targets multi-PeV horizontal tracks with minimal instrumentation density of around 1000 DOMs. We evaluate the astronomy potential of this design through 5-sigma point source detection flux normalization and diffuse flux limit,...
How to be socially and environmentally responsible in building a new neutrino observatory? I lead the TAMBO responsible siting team, where we are collaborating with Peruvian social scientists to understand local communities, use ethical practices to obtain consent, and build long-term beneficial collaborations with a broad range of local stakeholders as part of our main project goals.
I would like to give a presentation on TAMBO, which is a new neutrino telescope to be deployed in a deep valley. GNN would be a great forum in which to discuss TAMBO as the it is in line with the meeting expanding from its prior MANTS focus, to neutrino telescopes more broadly. Additionally, we are currently in the R&D stage of TAMBITO, the TAMBO prototype. Feedback from the community at this...
The geometrical layout of any experiment or detector can have a large impact on its ability to produce meaningful outcomes for physics. Oftentimes we see that optimal geometries can be unintuitive. Studying and optimizing this is therefore essential. This has become a relevant topic for the optimization of cubic-kilometer-scale neutrino telescopes, in particular, the Pacific Ocean Neutrino...
The presentation will show the preliminary results of GraphNet(graphic neuron network) application on neutrino telescope as a trigger algorithms. Since the application does not limit on a specific experiment, GNN is a good place to discuss it in community.
The search for neutrino sources in IceCube has focused primarily on IceCube’s northern sky, with the advantage that the Earth serves as a filter for the atmospheric muon background and provides a large effective volume. I would like to give a 5 - 10 min talk on my project which explores a new method for classifying atmospheric muon bundles and single muons with the goal of efficiently...
I want to give a talk about my machine learning work in IceCube (specifically regarding the NEPTUNE transformer models and its usage in a new event selection). I will be discussing aspects and features of the model and its training procedure that will be applicable and useful to any type of ML-based model, which should make it interesting across experiments.
pyFF is a new open-source framework, handling forward-folding analyses. With that, it can be used for various analyses in all GNN collaborations. An explicit future goal is to perform a joint IceCube-ARCA analysis on the galactic plane. We want to present this tool to the GNN audience to motivate stronger contributions to joint detector analyses.
We would like to present the ATLANT framework, a tool developed for advanced template-likelihood analyses. Designed originally for template diffuse analyses in ANTARES, it enables efficient handling of high-dimensional Template PDFs for testing models (like KRAγ, DiffUSE/CRINGE, or multimessenger targets such as LHAASO), and supports joint analyses across detectors such as ANTARES, IceCube,...
short summary (10 min) about the (interconnected) work published in "The promise of deep-stacking for neutrino astronomy" (https://arxiv.org/abs/2501.10213) and "Bayesian Deep-stacking for high-energy neutrino searches" (https://arxiv.org/abs/2502.01452).
"transformer normalizing flow" reconstruction recently developed in IceCube (https://arxiv.org/abs/2604.19846) and of interest to other neutrino telescopes
In this contribution, we present the development of an unbinned time-dependent analysis framework for KM3NeT/ARCA. This approach aims at improving the sensitivity to transient and variable neutrino sources by exploiting the event-level information, including reconstructed direction, energy, and arrival time.
The method is based on an unbinned likelihood in which the signal probability density...
We are performing a search using ANTARES data, exploiting expected time delays between neutrinos and a gamma-ray burst onset, in the presence of Lorentz Invariance Violation (LIV). There are publications from theorists performing a similar search with IceCube public HESE data; they found a hint with a LIV scale of 1/20th of the Planck mass. We used the same data in our full statistical...
I would like to present recent developments in IceCube's GFU-cluster alerts along with preliminary efforts to extend this framework to a joint IceCube-KM3NeT alert stream for identifying neutrino flares. The GNN meeting would be an excellent venue for this discussion as it brings together the neutrino telescope community and provides a forum to exchange ideas on the technical and...
I would like to give a talk on the most recent IceCube Galactic Plane results using a combined data set. In the talk, I can include many things we have learned about combining data sets and the galactic plane that go beyond the usual measurement results shown at conferences. This could include interesting details learned by combining data sets and techniques used in the actual measurement. ...
I would like to give a talk about "IceCube searches for high-energy neutrinos from gravitational-wave events in real time". The GNN meeting is a good venue for this because real time multimessenger astrophysics requires global collaboration between collaborations, and these are exciting sources for neutrino detectors in all GNN collaborations to search for.
I would like to give a talk on my measurement of the high energy DIS neutrino cross section using 10 years of IceCube data. This is a mature result approaching publication, but has not yet been shown to the wider community. The neutrino cross section is a shared model parameter and systematic uncertainty for neutrino telescopes. Even with FASER's measurements up to a few TeV, a gap exists...
I would like to give a talk on my current analysis in IceCube. The name of the analysis is: Inclusive Search for Taus and Charmed Hadrons in IceCube. This is relevant in the GNN meeting since similar searches are being performed in KM3NeT. My analysis will be the first one in IceCube that inclusively treats Taus and charms in the full pipeline from simulation to analysis. I think this will be...
I would like to give a talk on the measurement of the astrophysical flavor composition, combining multiple IceCube event selections including starting events, tracks, and cascades. I will discuss the challenges of detecting tau neutrinos, which motivates multi-sample combinations and future joint analyses across detectors within GNN to gain the much needed statistics. I will also introduce...
I am part of a group of people working on the POCAM (Precision Optical CAlibration Module), a calibration device developed at TUM designed to emit isotropic light to study detector systematics.
14 POCAMs have been successfully deployed in the IceCube Upgrade. We would like to present preliminary results from data collected during the devices' deployment and in the first weeks of operation,...
We use 3 inch PMTs from Hamamatsu. The PMTs are optically coupled to the glass with individual gel pads. Additionally, a spring-loaded system presses them against the glass and holds them in place. The GNN collaboration could benefit from this talk by discussing new ideas and developments for optical module design and production.
A technical contribution to share the progress the KM3NeT collaboration has made on the absolute position calibration of ARCA in the last year. This includes the discussion of calibration hardware developments, improved deployment accuracy and an overview of the absolute pointing efforts planned for the sea campaign of summer 2026. Moreover, the talk will introduce a novel software method to...
The Radio Neutrino Observatory in Greenland (RNO-G) is a radio neutrino array under construction at Summit Station, Greenland. It is planned to consist of 35 stations, of which 8 have already been deployed and are providing data. RNO-G will study ultra-high-energy (>10s PeV) neutrinos, thereby extending the energy range of current neutrino observatories (e.g. IceCube, KM3Net and GVD) and...
I would like to present a software tool to interpolate neutrino cross sections between different generators, and to construct correlated, data driven cross section uncertainties across reactor, accelerator, atmospheric and cosmic neutrino energies. This tool would enable global analyses of different types of neutrino experiments by unifying the cross section uncertainties. A first working...
The atmospheric neutrino self-veto plays a critical role in characterizing the atmospheric neutrino background, not only for IceCube but for neutrino telescopes in general. I would like to present recent updates to the modeling of the downgoing atmospheric neutrino self-veto in IceCube using gradient boosted decision trees. The GNN meeting is ideal for this contribution, as this work directly...
We would like to present the latest updates and future roadmap of MCEq (Matrix Cascade Equations), the atmospheric lepton flux modeling tool. MCEq now supports the newest hadronic interaction models (SIBYLL-2.3e, QGSJet-III, EPOS-LHC-R), updated cross-sections, and improved low-energy fluxes in the GeV range. With MCEq seeing growing popularity across the neutrino telescope community, this...
We are presenting our contributions to the VO High Energy Interest Group (HEIG) and develoment of the VODF format for neutrinos using ANTARES and KM3NeT data as example.
I can offer an update on the combined common alert structure for KM3Net and IceCube alerts as well as progress toward an updated common VOE-Event format for the future...
KM3NeT has developed an automated real-time analysis framework operating on data from its ARCA and ORCA detectors. Events are continuously reconstructed and machine-learning-based algorithms are used for neutrino/muon classification. The framework performs follow-ups of external multi-messenger alerts and monitors for core-collapse supernova neutrino bursts, both already operational, and is in...
The search for Lorentz Invariance Violation (LIV) in the neutrino sector offers a powerful avenue to probe physics beyond the Standard Model, particularly in the context of quantum gravity. High-energy atmospheric neutrinos detected by different neutrino telescopes provide a unique opportunity to test these effects over long baselines and wide energy ranges. This is particularly significant...
After the observation of KM3-230213A event, a cosmic neutrino with an estimated energy of 220 petaelectronvolts, the exploration of the ultra-high-energy neutrino spectrum has started. As current Cherenkov telescopes are not optimized for this range, combining observations from various experiments is crucial to further constrain the neutrino flux above a few petaelectronvolts. This will enable...
