{"id":"09046807-227e-4a0c-bb02-3041a8b30406","arxiv_id":"2508.09408","paper_version":1,"verdict":"UNVERDICTED","confidence":"LOW","novelty_score":6.0,"correctness_risk":"unknown","formal_verification":"none","parameter_count":0,"one_line_summary":"AT2022sxl is a candidate repeating TDE whose second optical flare and delayed MIR flare may be spatially and temporally matched to two IceCube Bronze neutrino events.","lead":"Astronomers report a candidate repeating tidal disruption event, AT2022sxl, with two optical flares separated by 7.2 years and a possible match to two IceCube neutrino events. If confirmed, it supports the idea that bright mid-infrared emission marks the tidal disruption events that produce neutrinos.","discovery_kind":"extension","skeptic_critique":{"model":"deepseek-v4-flash","headline":"No chance-coincidence probability is reported for the two IceCube Bronze events; without a post-trial p-value, the claimed neutrino-TDE association and the MIR-prerequisite conclusion are statistically unsupported.","rationale":"The reader's UNVERDICTED verdict is a fair response to the corrupted full text, and I agree that Bronze-event localization is the weakest link in the paper's central claim. My read goes slightly further: from the abstract alone, the claimed neutrino association lacks a necessary statistical quantity—a post-trial chance-coincidence probability—so the appropriate outcome is conditional acceptance rather than a purely open verdict. The repeating-TDE part may well be sound, but the headline contribution ('possible association with two high-energy neutrino events' and the MIR-prerequisite suggestion) should not be credited until the coincidence rate is quantified. The proposed Monte Carlo test would settle this: if the full text already contains such a calculation and it passes, the condition is satisfied; if not, the main conclusion should be downgraded. I therefore adjust from UNVERDICTED to CONDITIONAL.","tokens_in":13436,"tokens_out":4813,"duration_ms":51669,"concrete_test":"Using the event IDs and localizations in the paper's neutrino section, retrieve the public IceCube alert catalog up to the TDE observation date. Compute the post-trial chance probability of at least two Bronze events falling within the TDE's combined 90% spatial uncertainty and within the allowed time window around the second optical/MIR flare (including the ~200-day delay). Perform a Monte Carlo scramble with ≥10^5 realizations: randomize event directions among the catalog while preserving event-time structure, and count how many realizations produce two events inside the same small sky patch and time window. Include a trial factor for the choice of flare pair and delay. Report a one-sided p-value; if p exceeds ~1%, the neutrino association should be treated as a chance coincidence and the MIR-prerequisite conclusion should be withdrawn or heavily qualified.","verdict_should_be":"CONDITIONAL","load_bearing_attack":"The abstract's novel conclusion—that luminous MIR emission is a prerequisite for neutrino production in TDEs—rests on two IceCube Bronze events being physically associated with AT2022sxl. Bronze-type alerts are the lowest-significance IceCube event class and have large angular uncertainties (commonly degree-to-tens-of-degrees 90% error radii), so a spatial match with a z=0.23 host is weak evidence by itself. The temporal match ('the second flare, especially the delayed MIR flare') is also selected a posteriori: the TDE was found from a large-field survey, and the analysis can choose which flare, which delay, and which pair of Bronze events to count. The abstract reports no chance-coincidence probability, either per event or for two events, and no trial factor accounting for the survey's sky coverage and monitoring window. If the full text contains a proper post-trial calculation, this concern is met; but as presented, the central 'possible association with two high-energy neutrino events' and the MIR-prerequisite suggestion are not statistically grounded. This does not undermine the repeating-TDE classification itself, which is separately supported by two optical flares and the two spectra; it attacks only the neutrino link that gives the paper its broader significance.","agreement_with_reader":"agree"},"referee_report":{"model":"deepseek-v4-flash","summary":"The manuscript reports AT2022sxl as a candidate repeating tidal disruption event (TDE) found in large-field optical survey data, with two optical flares separated by ~7.2 yr and associated mid-infrared flares delayed by ~200 day. Two optical spectra are presented: one near the second optical peak from TNS and one at quiescent flux obtained with GTC. The authors classify the host as a composite galaxy at z=0.23 and the TDE as likely H+He type based on broad H-alpha, H-beta, and He I components. The central novel claim is that two IceCube Bronze-type neutrino events match AT2022sxl in position and in time with the second flare, especially the delayed MIR flare. From this, the authors suggest that luminous MIR emission is a prerequisite for neutrino production in TDEs. The full text supplied is corrupted mojibake; only the abstract is readable.","tokens_in":13762,"tokens_out":1867,"duration_ms":23013,"significance":"If the repeating-TDE classification and the neutrino association hold, AT2022sxl would be one of the few TDEs with a plausible high-energy neutrino counterpart, and the MIR-prerequisite suggestion would be a testable phenomenological claim. The repeating-TDE part has independent support from two optical flares and two spectra, and the use of external IceCube data avoids parameter circularity. However, the broader significance rests on the statistical robustness of the neutrino coincidence, which is not reported, and on a small sample of MIR-luminous TDEs. The paper's value at present is therefore that of a candidate/report: interesting but not yet quantitatively established.","major_comments":[{"comment":"The full text is unreadable mojibake; equations, tables, figures, and all quantitative details are garbled. This prevents verification of the claimed 7.2 yr separation, the ~200 day MIR delays, the spectral decomposition, and the neutrino coincidence. A readable manuscript with all supporting material must be provided before the claims can be assessed.","section":"Full text (as supplied)"},{"comment":"No chance-coincidence probability is given for the two IceCube Bronze events. Bronze events have large angular uncertainties and low individual significance. The abstract claims a positional and temporal match without quoting per-event or joint p-values, trial factors, or the neutrino error radii. Without this, the 'possible association' and the MIR-prerequisite conclusion are statistically unsupported.","section":"Abstract (neutrino association)"},{"comment":"The conclusion that luminous MIR emission is a prerequisite for neutrino production in TDEs is based on a small sample that includes AT2022sxl itself. The abstract reports no systematic control sample, no quantitative definition of 'luminous MIR', and no discussion of survey cadence or selection effects. This is a load-bearing interpretive claim and needs either a statistical comparison or a clearly framed hypothesis-generating caveat.","section":"Abstract and Discussion (MIR prerequisite)"}],"minor_comments":[{"comment":"The spectral classification is stated as 'H+He type' without defining the classification scheme or giving line-fit parameters; this should be specified in the text.","section":"Abstract"},{"comment":"The host classification 'composite galaxy' is asserted without showing the diagnostic line ratios; if present in the corrupted text, the relevant figure/table must be made legible.","section":"Abstract"},{"comment":"The manuscript should cite the IceCube alert stream documentation and specify how Bronze alerts are selected, since the association claim relies on the statistical meaning of this alert class.","section":"General"}],"recommendation":"major_revision","confidential_remarks":"The supplied full text is unreadable, so I could not perform a complete technical review. The abstract alone reveals a missing statistical treatment of the neutrino association, which is central to the paper's significance. I recommend major revision rather than desk rejection because the repeating-TDE classification may be sound and the neutrino analysis could be fixed by adding a proper post-trial chance-coincidence calculation. I also note that the MIR-prerequisite claim is based on a very small sample and should be framed more cautiously."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"Colleague,\n\nHere's my take on AT2022sxl. The new result is the source itself: a candidate repeating TDE with two optical flares separated by ~7.2 yr, MIR flares lagging by ~200 days, and a spectral classification (H+He type, composite host at z=0.23). The repeating classification is interesting even if the neutrino link fails. The authors also connect two IceCube Bronze events to the second flare, which would place this in the small sample of neutrino-associated TDEs and motivate the claim that luminous MIR emission is a prerequisite.\n\nI want to give credit where it's earned. The multi-wavelength analysis seems thoughtful, and the repetition of the flares is a solid basis for a candidate. The paper is honest in calling it a candidate rather than a discovery.\n\nThe soft spot is the neutrino association. The abstract reports no chance-coincidence probability for the two Bronze events, and Bronze events have large angular uncertainties. The temporal match is also selected a posteriori — one can pick which flare, which delay, and which pair among many. Without a post-trial p-value, the association is not statistically grounded. The MIR-prerequisite conclusion inherits that weakness. This is a real problem, but it may be solved in the full text. I cannot check because the copy I received is corrupted (mojibake), so I judged on the abstract alone. That is a practical limitation, not a judgment on the authors.\n\nIf the full text contains a proper chance-coincidence calculation, this paper could be a solid addition to the TDE-neutrino literature. If not, the neutrino claim is not supported, though the repeating TDE remains.\n\nI'd send it to peer review rather than desk-reject it. The field needs more sources like this, and a referee can check the statistics. I would not cite it yet for the neutrino connection without seeing the numbers, but I'd cite the repeating TDE if the light curves hold up.\n\nWorth a reading group slot after we get a readable version.","headline":"Candidate repeating TDE worth a referee, but the neutrino association is unproven without a chance-coincidence calculation.","tokens_in":14249,"tokens_out":2274,"would_cite":false,"duration_ms":23773,"reading_group":"maybe","serious_thinker":"unclear","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"deepseek-v4-flash","headline":"AT2022sxl is a candidate repeating tidal disruption event whose two optical flares, 7.2 years apart, match two IceCube neutrino alerts.","keywords":["tidal disruption event","repeating TDE","IceCube neutrinos","mid-infrared flare","optical flare","H+He TDE","composite host galaxy","neutrino-TDE association"],"falsifier":"Compute the chance-coincidence probability of two unrelated Bronze events falling within AT2022sxl's localization and within the ~200-day MIR window using IceCube's all-sky Bronze event rate; if that probability is not small, the association fails. Alternatively, a third optical/MIR flare with no coincident neutrino would weaken the claimed pattern.","tokens_in":13409,"feed_emoji":"🌌","tokens_out":4428,"duration_ms":43374,"temperature":0.7,"pith_summary":"The paper reports AT2022sxl, a tidal disruption event candidate that flared twice in the optical with a ~7.2 yr separation, with mid-infrared flares lagging each optical peak by ~200 days. The authors identify the host as a composite galaxy at z=0.23 and show that broad H$\\alpha$, H$\\beta$, and He I lines powered by the TDE dominate the second-flare spectrum. They also find that two Bronze-type IceCube neutrino events match the source position and the second flare / delayed MIR flare in time. If the association is real, AT2022sxl would join the small set of neutrino-emitting TDEs and support the claim that luminous MIR emission is a prerequisite for neutrino production. The repeating nature is central: repeated partial disruptions could be a recurring source of high-energy neutrinos.","feed_headline":"Two flares, two neutrinos: AT2022sxl is a repeating TDE","feed_subtitle":"If the IceCube matches hold, bright mid-infrared emission becomes a prerequisite for TDE neutrino production.","key_machinery":"The central objects are the multi-epoch optical and mid-infrared light curves of AT2022sxl plus two optical spectra, one taken near the second optical peak and one at quiescence. The light curves establish the ~7.2-year recurrence and the ~200-day MIR delay; the spectral comparison isolates the TDE's broad emission lines from the host galaxy's narrow lines; and the IceCube Bronze events act as the spatial-temporal link connecting the flares to high-energy neutrinos.","core_discovery":"AT2022sxl is a candidate repeating TDE: the optical light curve shows two distinct flares with peaks ~7.2 yr apart, each followed by a ~200-day-delayed mid-infrared flare. At the second optical peak, a spectrum shows broad emission in H$\\alpha$, H$\\beta$, and He I $\\lambda$5876 on top of a composite host galaxy at z=0.23, while a later quiescent spectrum shows the narrow host lines alone, confirming the TDE origin of the broad components. The paper reports that two Bronze-type IceCube neutrino events are positionally consistent with AT2022sxl and temporally aligned with the second flare and its delayed MIR flare. Together these make AT2022sxl a candidate repeating TDE and a possible neutrino","pith_inferences":["An implicit extension is that archival IceCube Bronze events could be systematically matched to known TDE light curves; AT2022sxl suggests low-significance events should not be ignored when multiple independent events align.","The paper's MIR-prerequisite suggestion points to a testable prediction: future TDE-neutrino associations should preferentially show bright dust-echo emission, while optically bright but MIR-dim TDEs should produce few neutrinos.","If the ~7.2-year recurrence is set by the orbital period of the partially disrupted star, the same object might produce additional flares at predictable epochs, offering a real-time search for neutrinos at the next peak."],"forward_implications":["If AT2022sxl is genuinely repeating, TDEs can recur on timescales of a few years, consistent with partial disruption of a star on an eccentric orbit.","The ~200-day MIR delay implies dust formation or reprocessing after each optical flare, giving a predictable sequence for future multi-wavelength observations.","A real neutrino match would add AT2022sxl to the small sample of TDE-neutrino associations and tighten the empirical link between MIR-luminous TDEs and neutrino production.","The next optical/MIR flare can be predicted roughly on the ~7.2-year cycle and should be monitored with X-ray, UV, and neutrino telescopes.","Comparing the two flares' spectra and light curves can test whether the same star is being repeatedly partially disrupted."],"supporting_citations":[],"fun_headline_variants":["AT2022sxl: repeating TDE flares twice, possible neutrino link","Two flares, two neutrinos: AT2022sxl repeats as TDE","Repeating TDE AT2022sxl may explain two IceCube events","AT2022sxl: TDE repeats, and IceCube neutrinos may match","Candidate repeating TDE AT2022sxl possibly linked to neutrinos"],"cache_read_input_tokens":2816,"weakest_assumption_plain":"The neutrino association rests on accepting two low-significance IceCube Bronze events with large angular uncertainties as reliable positional and temporal matches; if they are chance coincidences, the neutrino-TDE connection and the MIR-prerequisite suggestion lose their main support.","fun_headline_variants_meta":{"raw":{"variants":["AT2022sxl: repeating TDE flares twice, possible neutrino link","Two flares, two neutrinos: AT2022sxl repeats as TDE","Repeating TDE AT2022sxl may explain two IceCube events","AT2022sxl: TDE repeats, and IceCube neutrinos may match","Candidate repeating TDE AT2022sxl possibly linked to neutrinos"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.000866,"raw_usage":{"total_tokens":3624,"prompt_tokens":813,"completion_tokens":2811,"prompt_tokens_details":{"cached_tokens":256},"prompt_cache_hit_tokens":256,"prompt_cache_miss_tokens":557,"completion_tokens_details":{"reasoning_tokens":2708}},"tokens_in":557,"tokens_out":2811,"duration_ms":20676,"temperature":1.0,"reasoning_tokens":2708,"cache_read_input_tokens":256,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-05T21:03:25.922478+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"Compute the chance-coincidence probability of two unrelated Bronze events falling within AT2022sxl's localization and within the ~200-day MIR window using IceCube's all-sky Bronze event rate; if that probability is not small, the association fails. Alternatively, a third optical/MIR flare with no coincident neutrino would weaken the claimed pattern.","supporting_citations":[],"review_version":1}