{"id":"4bdf2919-7f3d-4dff-a52b-e90a76925290","arxiv_id":"2501.18076","paper_version":1,"verdict":"UNVERDICTED","confidence":"MODERATE","novelty_score":1.0,"correctness_risk":"unknown","formal_verification":"none","parameter_count":2,"one_line_summary":"A conference-style review of recent IceCube and KM3NeT neutrino results, with no new analysis, pointing to Seyfert galaxies as emerging neutrino sources.","lead":"This paper reviews recent IceCube and KM3NeT results on atmospheric and astrophysical neutrinos, including a 3.0 sigma stacked excess from 13 southern Seyfert galaxies. It also describes a several-tens-of-PeV event detected by the partially built KM3NeT detector.","discovery_kind":"review","skeptic_critique":{"model":"deepseek-v4-flash","headline":"The 3.0σ stacking claim is labeled a pre-trial local p-value in Table 1, so the abstract's 'independent evidence' is unsupported without a trial correction.","rationale":"The reader's UNVERDICTED verdict is motivated by unverifiability. My stress test adds a concrete, internally checkable reason for doubt: Table 1 explicitly labels all quoted p-values as pre-trial local, and the 13-source stacking row lists 0.0013 (3.0σ). In a search over 13 selected sources, a local p-value is not the quantity that should be quoted as 'evidence' in the abstract. The reader's weakest assumption concerned the disc-corona model weights; I agree that is a real issue, but the more immediate and load-bearing problem is that the manuscript never establishes that the 3.0σ survives trial correction. The original preliminary analysis by Yu et al. may well have a valid post-trial significance, but this paper does not report it. This is not an integrity accusation: proceedings summaries frequently quote local significances and the author may have simply omitted the trials correction. The fix is inexpensive: state explicitly that 3.0σ is pre-trial local, give the post-trial value, describe the 13-source selection and model-weight dependence, and mark Yu et al. (2024) as a self-cited preliminary analysis. With those revisions the summary would be accurate and the 'independent evidence' claim could be evaluated. Therefore I recommend CONDITIONAL rather than REJECT, because the central claim is repairable by a revision, and rather than UNCHANGED, because the internal table label already gives a concrete reason to doubt the headline claim as written.","tokens_in":7240,"tokens_out":5546,"duration_ms":64052,"concrete_test":"Request from the author the Yu et al. (2024) analysis document or the post-trial p-value for the 13-source stacking, and recompute the significance of the 6.7-event excess after applying a trials correction for the 13 sources and the model-weight choice. If the corrected p-value is above 0.01, the 3.0σ cannot be presented as evidence.","verdict_should_be":"CONDITIONAL","load_bearing_attack":"Section 3 and Table 1 carry the paper's central claim: a stacking analysis of 13 Southern Hemisphere Seyferts yields a 6.7-event excess at 3.0σ, described as 'independent evidence' that X-ray-bright Seyfert galaxies may be neutrino sources. But the only significance information given is the table caption's 'pre-trial p-value (plocal)' and the stacked-source row's plocal = 0.0013 (3.0σ). A pre-trial local 3.0σ is not an evidence-level significance once 13 sources are searched, and the paper provides no post-trial p-value or number of trials. The same section also states that each source was weighted by the expected IceCube signal under the disc-corona model (Kheirandish et al. 2021) and that the analysis comes from Yu et al. (2024), a self-cited, apparently unpublished conference result. Thus the abstract's 'independent evidence' framing is not supported by the manuscript's own numbers: the excess could be a trial fluctuation, and the stacking significance depends on the model weights and on a source selection that is not described. The paper may accurately quote a preliminary IceCube local significance, but as written it overstates that local significance as a cumulative signal.","agreement_with_reader":"partial"},"referee_report":{"model":"deepseek-v4-flash","summary":"This manuscript is a short, conference-style review of recent IceCube and KM3NeT results. It summarizes atmospheric muon-neutrino flux measurements, neutrino oscillation analyses from DeepCore and ORCA, sterile-neutrino searches, and astrophysical-neutrino follow-ups of X-ray-bright Seyfert galaxies. Its central new claim is that a stacking analysis of 13 Southern-Hemisphere Seyferts, weighted by a disc-corona model, yields a cumulative excess of 6.7 events at 3.0 sigma, which the abstract describes as independent evidence for Seyferts as neutrino sources. The paper also reports a KM3NeT ultra-high-energy event of several tens of PeV and discusses the future potential of ARCA.","tokens_in":7463,"tokens_out":5156,"duration_ms":54056,"significance":"If the stacked 3.0 sigma signal were a properly trial-corrected, model-robust measurement, the paper would provide a useful cross-experiment synthesis and would strengthen the case that a subset of X-ray-bright Seyfert galaxies are high-energy neutrino emitters. The article is clearly organized and helpful in collecting atmospheric and oscillation results from both experiments, and it explicitly acknowledges important systematic limitations, such as KM3NeT energy-scale uncertainties and Monte Carlo modeling challenges. However, the headline astrophysical claim currently rests on an unpublished, author-owned analysis and on a pre-trial local p-value; as written, the paper does not substantiate the phrase 'independent evidence.' Because the claim is central to the abstract and summary, the manuscript needs substantial revision in presentation and evidentiary framing.","major_comments":[{"comment":"Table 1 labels the stacked-source p-value as pre-trial (plocal = 0.0013, 3.0 sigma), and the table caption states that all listed p-values are pre-trial. The abstract and Section 4 nevertheless describe this result as 'a cumulative neutrino signal at 3.0 sigma' and 'independent evidence.' A pre-trial local p-value does not account for the fact that 13 sources were searched, nor for the freedom in the stacking weights; the manuscript provides no post-trial p-value and no number of trials. Since the text itself quotes a post-trial significance of 2.9 sigma for NGC 4151, the distinction is known to the author and should be applied consistently to the stacking result.","section":"Abstract and Section 3 / Table 1"},{"comment":"The stacking significance depends on three ingredients that are not documented in the manuscript: the list of 13 sources and their selection criteria, the Galactic neutrino background model (cited as R. et al. 2023), and the disc-corona neutrino spectra from Kheirandish et al. (2021) used to weight each source. The text states only that each source was weighted by its expected IceCube signal under that model, with no quantitative treatment of how the 3.0 sigma changes under model or background uncertainties. Because Yu et al. (2024) is referenced without a journal, arXiv number, or version, the reader cannot verify the central result or assess the impact of the model assumptions on the claimed significance.","section":"Section 3, stacking analysis paragraph"},{"comment":"The ultra-high-energy KM3NeT event is described as 'several tens of PeV,' arriving from approximately one degree above the horizon, and as occurring only once in a million detected events. No reconstructed energy, arrival-direction uncertainty, or local/post-trial significance is given, and no public KM3NeT reference is cited for the event. As presented, the reader cannot distinguish a robust astrophysical candidate from a background fluctuation; the claim should be accompanied by the public KM3NeT number and significance, or explicitly labeled as a preliminary event report.","section":"Section 3, KM3NeT ultra-high-energy event"}],"minor_comments":[{"comment":"There is a typo in the Introduction: 'proprieties' should be 'properties.'","section":"Introduction"},{"comment":"Several references are malformed or incomplete, including 'R., A., et al. 2023, Science' and 'R.A., et al. 2024,' which obscure the relevant collaborations, and the first reference in the list has no author names; these should be expanded to standard collaboration author lists.","section":"References"},{"comment":"The figure legend uses the abbreviation 'w/o' without defining it in the caption; it should be written as 'without Centaurus A' or defined explicitly, and '5 DP' should be expanded to '5 sigma discovery potential.'","section":"Figure 6 caption"},{"comment":"For consistency, the table should state for every row whether the quoted p-value is pre-trial or post-trial, not only for the stacked sources row, especially since the text quotes a post-trial value for NGC 4151.","section":"Table 1"}],"recommendation":"major_revision","confidential_remarks":"This reads as a proceedings contribution rather than a full research article. The main concern is that its most novel claim, the 3.0 sigma stacking result, is taken from an unpublished reference by the same author and is presented with a pre-trial local p-value described as if it were an evidence-level cumulative signal. If the journal publishes summary/proceedings articles, the author should be required either to cite a public, versioned analysis with post-trial significances or to rephrase the claim as a preliminary local excess. The KM3NeT ultra-high-energy event also needs a proper quantitative citation. I do not see grounds for rejection if these framing issues are corrected, but the current abstract overstates the supporting evidence."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"You should know: this is a proceedings-style review, not a research paper. It contains no new data or derivation. What it does well is assemble a compact, current status report on IceCube and KM3NeT results, and the atmospheric neutrino sections quote oscillation measurements consistently. Table 1 is genuinely useful, and it at least labels p-values as pre-trial for the sources where that distinction matters.\n\nThe soft spot is load-bearing in the abstract and Section 3. The phrase 'cumulative neutrino signal at 3.0 sigma, offering independent evidence' is not supported by the paper's own numbers. Table 1 lists the stacked-source significance as plocal = 0.0013 (3.0 sigma), which is pre-trial. With 13 sources in the search, a local 3.0 sigma is not evidence-level, and no post-trial p-value or trials factor is given. The stacking analysis is from Yu et al. (2024), a self-cited, apparently unpublished conference result, so calling it 'independent evidence' is misleading—at minimum it should say 'independent of Northern Hemisphere searches.' The model dependence of the weights and the Galactic background treatment are stated but not quantified; for a review that is acceptable, but the abstract should say 'preliminary local significance' rather than 'independent evidence.'\n\nThe reference list is messy: several entries have garbled author strings, like 'R.A., et al. 2024' and a bare '2022, Progress in Particle and Nuclear Physics.' That is a copyedit problem, not a scientific one. The published results quoted elsewhere, such as NGC 1068 at 4.7 sigma and NGC 4151 at 3.9 sigma, look accurately reported.\n\nNone of this makes the paper incoherent. The stress-test concern lands: the central claim in the abstract is overstated relative to the table. But it is fixable with a sentence or two, and the review is a reasonable snapshot for someone who wants a quick map of where IceCube and KM3NeT stand. I would accept this for a light peer review as a proceedings contribution, with mandatory revision of the abstract and Table 1 framing, plus a reference cleanup. I would not cite it in my own work, but I would bring it to a reading group to discuss how preliminary conference results can migrate into reviews as evidence.","headline":"A useful conference-floor review with an abstract that overstates a pre-trial, self-cited stacking significance as 'independent evidence.'","tokens_in":8004,"tokens_out":3379,"would_cite":false,"duration_ms":36651,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"deepseek-v4-flash","headline":"Stacked Seyfert galaxies show a 3-sigma neutrino excess, supporting them as high-energy neutrino sources.","keywords":["high-energy neutrinos","IceCube","KM3NeT","Seyfert galaxies","active galactic nuclei","neutrino oscillations","atmospheric neutrinos","stacking analysis"],"falsifier":"Recompute the stacking of the same 13 sources using an $E^{-2}$ spectrum or an updated Galactic diffuse template; if the local significance falls below 3 $\\sigma$, the excess depends on the disc-corona weights rather than on an intrinsic source population. Alternatively, a KM3NeT/ARCA stacking of the same sources with comparable exposure that finds no excess would challenge the claim.","tokens_in":6981,"feed_emoji":"🔭","tokens_out":6210,"duration_ms":59972,"temperature":0.7,"pith_summary":"This review synthesizes recent IceCube and KM3NeT results to argue that X-ray-bright Seyfert galaxies are emerging as a genuine source class of high-energy neutrinos, not just one exceptional galaxy. The key new result it highlights is a stacking analysis of 13 Southern-Hemisphere Seyferts that finds a cumulative excess of 6.7 events over background, at 3.0 sigma significance. On the atmospheric side, the paper points to competitive measurements of neutrino oscillation parameters from DeepCore and ORCA, while KM3NeT's ARCA detector has recorded an ultra-high-energy event of several tens of PeV. If these claims hold, neutrino telescopes can use Seyfert galaxies to map cosmic-ray acceleration in active galactic nuclei.","feed_headline":"Stacked Seyfert galaxies show a 3-sigma neutrino excess","feed_subtitle":"IceCube and KM3NeT results together point to X-ray-bright Seyferts as high-energy neutrino sources.","key_machinery":"The carrying mechanism is the stacking search for neutrino point sources, in which each of 13 selected Southern-Sky sources is weighted by the number of signal events IceCube would expect if the source followed the disc-corona model, a model that derives each Seyfert's expected neutrino flux from its X-ray corona, and the weighted events are summed and tested against background. The background model also subtracts diffuse Milky Way neutrino emission, which is critical for sources near the Galactic Plane such as Circinus and Centaurus A. This weighting is what turns a set of individually sub-threshold sources into a combined 3.0 sigma signal.","core_discovery":"The paper's central claim is that independent searches now point to a population of X-ray-bright Seyfert galaxies as high-energy neutrino emitters. Following IceCube's evidence for neutrino emission from NGC 1068, follow-up studies identify NGC 4151, NGC 3079, CGCG 420-015, and the Circinus Galaxy as candidate sources; a stacking analysis of 13 Southern-Hemisphere sources reports a combined 6.7-event excess at 3.0 sigma significance. The paper also reports KM3NeT's detection of an ultra-high-energy neutrino event at several tens of PeV arriving about 1 degree above the horizon, which it treats as a preview of Southern-Hemisphere capabilities. Its broader assertion is that IceCube and KM3NeT together provide complementary full-sky coverage that will turn candidate Seyfert sources into established cosmic-ray accelerators.","pith_inferences":["Beyond the paper: If the 3.0 sigma stacking signal is real and the disc-corona weighting is roughly right, the Seyfert neutrino luminosity function is likely dominated by the most X-ray-bright members, and the same population could explain part of the diffuse astrophysical neutrino flux.","Beyond the paper: The stacking result could be tested with KM3NeT data alone, since KM3NeT sees the Southern sky well; an independent stacking of the same 13 sources with similar weights would either confirm the excess or reveal that the IceCube result depends on Northern-hemisphere systematics.","Beyond the paper: A natural extension is to apply per-source Galactic diffuse background modeling to other source classes near the Galactic Plane, rather than subtracting a single global template."],"forward_implications":["X-ray-bright Seyfert galaxies join blazars and the Galactic plane as empirically supported sites of high-energy neutrino production.","The candidate source list expands from NGC 1068 to include NGC 4151, NGC 3079, CGCG 420-015, and the Circinus Galaxy, giving targeted multi-messenger follow-up targets.","Once KM3NeT/ARCA is fully deployed, its better Southern-Hemisphere sensitivity should allow independent confirmation or rejection of the 3.0 sigma stacking excess.","The reported ultra-high-energy KM3NeT event supports searches for multi-PeV neutrinos and motivates combined IceCube-KM3NeT all-sky analyses.","Atmospheric neutrino measurements from DeepCore and ORCA will feed global fits that may determine the neutrino mass ordering at 3 sigma."],"supporting_citations":[{"why":"Catalog search showing a 2.7 sigma collective excess from Northern X-ray-bright Seyferts, with NGC 4151 and CGCG 420-015 as main contributors.","marker":"Abbasi et al. (2024c)"},{"why":"IceCube search for neutrino emission from hard X-ray AGN reporting the NGC 1068 and NGC 4151 excesses and the candidate list in Table 1.","marker":"R.A. et al. (2024)"},{"why":"Reports neutrino excesses from NGC 4151 and NGC 3079 with a combined p-value below 2.6e-7, independent Seyfert evidence.","marker":"Neronov et al. (2024)"},{"why":"The Southern-Hemisphere analysis and stacking of 13 sources that yields the 6.7-event, 3.0 sigma excess central to the paper.","marker":"Yu et al. (2024)"},{"why":"Disc-corona model used to derive expected neutrino spectra for weighting each stacked source.","marker":"Kheirandish et al. (2021)"},{"why":"Milky Way diffuse neutrino emission measurement used to model and remove Galactic background for sources near the plane.","marker":"R. et al. (2023)"},{"why":"Stacking method used to combine sub-threshold source signals.","marker":"Achterberg et al. (2006)"},{"why":"IceCube evidence for neutrino emission from NGC 1068 that motivated the Seyfert follow-up program.","marker":"Abbasi et al. (2022)"},{"why":"KM3NeT results including ORCA oscillation measurements and the ultra-high-energy ARCA event.","marker":"Joao et al. (2024)"}],"fun_headline_variants":["Stacked Seyfert galaxies show 3-sigma neutrino excess","Seyfert sources stacked to 3-sigma neutrino signal","Neutrino telescopes converge on Seyfert emitters","3-sigma excess from Seyfert neutrino stacking","Seyfert galaxies as neutrino sources from stacking"],"cache_read_input_tokens":3200,"weakest_assumption_plain":"The stacking claim rests on two assumptions: the model connecting each Seyfert's X-ray corona to its expected neutrino spectrum sets the right weights, and the background subtraction fully removes Milky Way neutrinos for sources near the Galactic Plane; if either fails, the 6.7-event excess is not a reliable source signal.","fun_headline_variants_meta":{"raw":{"variants":["Stacked Seyfert galaxies show 3-sigma neutrino excess","Seyfert sources stacked to 3-sigma neutrino signal","Neutrino telescopes converge on Seyfert emitters","3-sigma excess from Seyfert neutrino stacking","Seyfert galaxies as neutrino sources from stacking"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.00033,"raw_usage":{"total_tokens":1864,"prompt_tokens":998,"completion_tokens":866,"prompt_tokens_details":{"cached_tokens":384},"prompt_cache_hit_tokens":384,"prompt_cache_miss_tokens":614,"completion_tokens_details":{"reasoning_tokens":788}},"tokens_in":614,"tokens_out":866,"duration_ms":9148,"temperature":1.0,"reasoning_tokens":788,"cache_read_input_tokens":384,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-10T00:44:58.174992+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"Recompute the stacking of the same 13 sources using an $E^{-2}$ spectrum or an updated Galactic diffuse template; if the local significance falls below 3 $\\sigma$, the excess depends on the disc-corona weights rather than on an intrinsic source population. Alternatively, a KM3NeT/ARCA stacking of the same sources with comparable exposure that finds no excess would challenge the claim.","supporting_citations":[{"cited_title":"2006, Astroparticle Physics, 26, 282–300 Adri´ an-Mart ´ ınez, S., et al","cited_arxiv_id":null,"evidence_quote":"Stacking method used to combine sub-threshold source signals."},{"cited_title":"2022, Science, 378, 538–543","cited_arxiv_id":null,"evidence_quote":"IceCube evidence for neutrino emission from NGC 1068 that motivated the Seyfert follow-up program."},{"cited_title":"2024, Latest results from KM3NeT, ,","cited_arxiv_id":null,"evidence_quote":"KM3NeT results including ORCA oscillation measurements and the ultra-high-energy ARCA event."}],"review_version":1}