{"total":19,"items":[{"citing_arxiv_id":"2605.11703","ref_index":166,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"GW240925 and GW250207: Astrophysical Calibration of Gravitational-wave Detectors","primary_cat":"gr-qc","submitted_at":"2026-05-12T07:58:35+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":8.0,"formal_verification":"none","one_line_summary":"The first informative astrophysical calibration of gravitational-wave detectors is reported using GW240925 and GW250207.","context_count":1,"top_context_role":"method","top_context_polarity":"use_method","context_text":"spiral software pipeline [51-54], with the MBTA pipeline [60, 61], the PyCBC package [157-159] and thecWB pack- ages [49, 50, 160-162]. Estimates of the noise spectra and glitch models, as well as tests of residuals, were obtained using BayesWa ve[163-165]. Signal parameter estimation was performed with the Bilbylibrary [70, 71] using the Dynestynested-sampling package [166]. SEOBNRv5PHM waveforms used in parameter estimation were generated us- ingpySEOBNR [167]. PESummarywas used to postpro- cess and collate parameter-estimation results [168]. Tests of GR were performed with the FTI [116], TIGER [118- 120] andpSEOBNR [126-130] tests implemented in Bil- byTGR [169], as well as with the QNMRF [131-134] and ringdown[135-137] pipelines."},{"citing_arxiv_id":"2605.04579","ref_index":38,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"The Impact of Spin Priors on Parameterized Tests of General Relativity","primary_cat":"gr-qc","submitted_at":"2026-05-06T07:30:35+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Spin prior choices propagate into tests of GR via the 1.5PN deviation parameter δφ̂3 in a non-trivial, event-dependent way, with stronger effects for short-inspiral events and partial degeneracy with χ_eff when the deviation is included.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2605.03021","ref_index":37,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Closing the knowledge gap in semileptonic $B\\rightarrow X_c\\ell\\nu$ decays","primary_cat":"hep-ph","submitted_at":"2026-05-04T18:00:13+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":4.0,"formal_verification":"none","one_line_summary":"The unmeasured fraction of inclusive semileptonic B to charm decays is dominated by final states without D mesons, likely from baryons and Ds mesons.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2604.15965","ref_index":47,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Improved Constraints on Non-Kerr Deviations from Binary Black Hole Inspirals Using GWTC-4 Data","primary_cat":"gr-qc","submitted_at":"2026-04-17T11:29:10+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":3.0,"formal_verification":"none","one_line_summary":"Bayesian constraints from GWTC-4 binary black hole inspirals show Johannsen metric deformation parameters α13 and ε3 consistent with zero, supporting the Kerr hypothesis.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2604.15885","ref_index":72,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Gravitational-wave astronomy requires population-informed parameter estimation","primary_cat":"gr-qc","submitted_at":"2026-04-17T09:31:16+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":4.0,"formal_verification":"none","one_line_summary":"Population-informed hierarchical parameter estimation is required for unbiased astrophysical interpretation of gravitational-wave events rather than using standard individual posteriors with reference priors.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2604.14270","ref_index":105,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Fast neural network surrogate for multimodal effective-one-body gravitational waveforms from generically precessing compact binaries","primary_cat":"gr-qc","submitted_at":"2026-04-15T18:00:00+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Neural network surrogate approximates precessing compact binary gravitational waveforms up to 1000x faster than the base EOB model with validated accuracy.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2604.13839","ref_index":33,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Basilic: An end-to-end pipeline for Bayesian burst inference and model classification in gravitational-wave data","primary_cat":"gr-qc","submitted_at":"2026-04-15T13:10:22+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":4.0,"formal_verification":"none","one_line_summary":"Basilic is an end-to-end Bayesian pipeline for gravitational-wave burst inference and model classification, with a case study showing signal degeneracies between binary black hole mergers and cosmic strings.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2604.12987","ref_index":125,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Do equation of state parametrizations of dark energy faithfully capture the dynamics of the late universe?","primary_cat":"astro-ph.CO","submitted_at":"2026-04-14T17:22:34+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"Node-based reconstruction of cosmic expansion prefers stronger deceleration at z≈1.7 than smooth DE EoS parametrizations, isolating z~1.5-2 as a window where the latter may compress localized kinematic features permitted by current data.","context_count":1,"top_context_role":"method","top_context_polarity":"use_method","context_text":"history can be obtained straightforwardly by differenti- ating the interpolant for each posterior sample. In this way, uncertainties inE ′(z),H ′(z), andq(z) are prop- agated directly through the sampling procedure rather than reconstructed in a separate post-processing step. For parameter estimation and evidence evaluation, we use theSimpleMCcode [124], which employs the nested- sampling packagedynesty[125] to implement nested sampling [126]. Each run is performed with 500 live points and a convergence tolerance of 0.01. In the re- construction framework we adopt broad flat priorsH 0 ∈ [40,90] km s −1 Mpc−1,E i ∈[0.5,4.0]. These node lo- cations and priors are chosen to cover the redshift range directly probed by the late-time data while remaining ag-"},{"citing_arxiv_id":"2604.12587","ref_index":69,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Impact of the SNe Ia Magnitude Transition at 20 Mpc on Cosmological Parameter Estimation","primary_cat":"astro-ph.CO","submitted_at":"2026-04-14T11:10:26+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":4.0,"formal_verification":"none","one_line_summary":"A 0.19 mag step in supernova absolute magnitude at 20 Mpc improves data fit and increases the Hubble constant by 2% while leaving matter density and dark energy parameters stable.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2604.11903","ref_index":144,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Post-Newtonian inspiral waveform model for eccentric precessing binaries with higher-order modes and matter effects","primary_cat":"gr-qc","submitted_at":"2026-04-13T18:00:35+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"pyEFPEHM extends prior PN models to include higher-order quasi-circular phasing, generalized precession solutions, and eccentric corrections up to 1PN in selected multipoles for eccentric precessing binaries with matter effects.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"stability and robustness of the waveform model. There- fore, performing PE provides a stringent and informative validation of the waveform model. Here, we perform PE usingbilby[140-142], em- ploying its implementation of thedynesty[143] nested sampling algorithm. To assess the PE performance of pyEFPEHMin a controlled setting, we perform zero-noise injections [144]. This approach avoids both the statis- tical fluctuations associated with specific noise realiza- tions and the additional uncertainty inherent in real- event analyses, for which the true source parameters are unknown. Synthetic signals are injected into the LIGO Hanford (H1), LIGO Livingston (L1), and Virgo detec- tors, assuming the LIGO A+ and Virgo AdV+ sensitivity"},{"citing_arxiv_id":"2604.11895","ref_index":121,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Novel ringdown tests of general relativity with black hole greybody factors","primary_cat":"gr-qc","submitted_at":"2026-04-13T18:00:07+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":7.0,"formal_verification":"none","one_line_summary":"GreyRing model based on greybody factors reproduces numerical relativity ringdown signals with mismatches of order 10^{-6} and enables a new post-merger consistency test of general relativity applied to GW250114.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2604.09828","ref_index":53,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Testing the Kerr hypothesis beyond the quadrupole with GW241011","primary_cat":"gr-qc","submitted_at":"2026-04-10T18:58:10+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":8.0,"formal_verification":"none","one_line_summary":"GW241011 data shows consistency with Kerr black holes for both quadrupole and octupole moments and delivers the first observational bounds on spin-induced octupole deviations.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2604.08179","ref_index":38,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"GW231123: False Massive Graviton Signatures from Unmodeled Point-Mass Lensing","primary_cat":"gr-qc","submitted_at":"2026-04-09T12:35:47+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Unmodeled point-mass lensing produces a spurious nonzero graviton mass posterior in GW231123 that vanishes when lensing is included in the analysis.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2604.07388","ref_index":74,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"GW190711_030756 and GW200114_020818: astrophysical interpretation of two asymmetric binary black hole mergers in the IAS catalog","primary_cat":"astro-ph.HE","submitted_at":"2026-04-08T05:45:02+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":4.0,"formal_verification":"none","one_line_summary":"Two asymmetric BBH mergers are characterized with mass ratios 0.35 and ≤0.20; one shows high spins, negative χ_eff, and strong precession, suggesting an emerging population of massive rapidly spinning systems.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2604.06090","ref_index":110,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Posterior Predictive Checks for Gravitational-wave Populations: Limitations and Improvements","primary_cat":"gr-qc","submitted_at":"2026-04-07T17:03:44+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Maximum-likelihood-based posterior predictive checks detect model misspecification better than event-level versions for uncertain spin tilts, but current detector sensitivity limits their power; the Gaussian Component Spins model underpredicts high spin magnitudes and overpredicts anti-aligned tilts","context_count":1,"top_context_role":"method","top_context_polarity":"use_method","context_text":"dimensional posterior of binary parameters using theIMRPhenomXPHMwaveform model, with standard priors for all parameters. Posteriors were sampled stochastically using the implementation of the nested samplerDynesty[96] in the parameter-estimation codeBilby[97]. A network optimal SNR cut of 10 was performed on the samples to ensure consistency with the selection process [110]. We establish the following notation for hierarchical/population inference. The posterior on population-level param- eters Λ given a GW catalog ⃗d(also called the \"hyper-posterior\") is p(Λ| ⃗d) = L( ⃗d|Λ)π(Λ) p( ⃗d) ,(A1) where the data ⃗d={d i}are fromN obs independent events, and the population likelihood (or \"hierarchical likelihood\") is L( ⃗d|Λ)∝"},{"citing_arxiv_id":"2601.07908","ref_index":110,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Signatures of a subpopulation of hierarchical mergers in the GWTC-4 gravitational-wave dataset","primary_cat":"gr-qc","submitted_at":"2026-01-12T19:00:00+00:00","verdict":null,"verdict_confidence":null,"novelty_score":null,"formal_verification":null,"one_line_summary":null,"context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"89, 035007 (2017), arXiv:1709.03144 [nucl-ex]. [108] G. Costa, A. Bressan, M. Mapelli, P. Marigo, G. Iorio, and M. Spera, Mon. Not. Roy. Astron. Soc.501, 4514 (2021), arXiv:2010.02242 [astro-ph.SR]. [109] C. Plunkett, T. Callister, M. Zevin, and S. Vitale, The data supporting the results of this study will be made available upon publication. (2025). [110] J. S. Speagle, Mon. Not. Roy. Astron. Soc.493, 3132 (2020), arXiv:1904.02180 [astro-ph.IM]. [111] G. Ashtonet al., Astrophys. J. Suppl.241, 27 (2019), arXiv:1811.02042 [astro-ph.IM]. [112] I. Mandel, W. M. Farr, and J. R. Gair, Mon. Not. Roy. Astron. Soc.486, 1086 (2019), arXiv:1809.02063 [physics.data-an]. [113] S. Vitale, D. Gerosa, W. M. Farr, and S."},{"citing_arxiv_id":"2509.08054","ref_index":172,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"GW250114: testing Hawking's area law and the Kerr nature of black holes","primary_cat":"gr-qc","submitted_at":"2025-09-09T18:00:07+00:00","verdict":"ACCEPT","verdict_confidence":"MODERATE","novelty_score":5.0,"formal_verification":"none","one_line_summary":"GW250114 data confirm the remnant black hole ringdown frequencies lie within 30% of Kerr predictions and that the final horizon area is larger than the sum of the progenitors' areas to high credibility.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2111.03606","ref_index":159,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run","primary_cat":"gr-qc","submitted_at":"2021-11-05T16:43:17+00:00","verdict":"ACCEPT","verdict_confidence":"HIGH","novelty_score":4.0,"formal_verification":"none","one_line_summary":"GWTC-3 catalogs 90 compact binary coalescence events with p_astro > 0.5 from LIGO and Virgo's first three observing runs, including the first confident neutron star-black hole binaries.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"Becaue of the correlations between masses and spins [152-154], multimodality in mass distributions may also translate to multiple peaks in the effective inspiral spin distribu- tion. Multimodality can arise due to the complexity of the likelihood surface when using waveform models that include higher-order multipole moments [19, 155- 157] and precession [158, 159], noise fluctuations for quiet signals [160], the presence of glitches [161-163], or there being multiple overlapping signals in the data (which is unlikely given O3 sensitivity) [164]. Therefore, multi- modality is expected in a few cases. Cases with significant multimodality are GW200208 222617, GW200308 173609 and GW200322 091133. These candidates have modest"},{"citing_arxiv_id":"2010.14527","ref_index":233,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run","primary_cat":"gr-qc","submitted_at":"2020-10-27T18:01:31+00:00","verdict":"ACCEPT","verdict_confidence":"HIGH","novelty_score":7.0,"formal_verification":"none","one_line_summary":"LIGO and Virgo detected 39 compact binary coalescence events in O3a, including 13 new ones, with black hole binaries up to 150 solar masses and the first significantly asymmetric mass ratios.","context_count":1,"top_context_role":"method","top_context_polarity":"use_method","context_text":"GstLAL-based inspiral software pipeline [110, 121, 122] built on the LALSuite software library [287], and with the PyCBC [29, 123-126] and cWB [111, 117- 120] packages. Parameter estimation was performed with the LALInference [177] and LALSimulation libraries within LALSuite [287], the Bilby and Parallel Bilby libraries [230-232] using the dynesty nested sampling package [233], and the RIFT library [227-229]. PESum- mary was used to post-process and collate parameter es- timation results [235]. Estimates of the noise spectra and glitch models were obtained using BayesWave [106, 107, 180]. The cWB and BayesWave packages were also used to generate waveform reconstructions. Plots were prepared with Matplotlib [288], Seaborn [289] and"}],"limit":50,"offset":0}