A new gravitational wave event reveals a binary black hole merger with total mass 190-265 solar masses, indicating black holes can form via gravitational-wave driven mergers beyond standard stellar channels.
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A Gaussian process framework with a localized-deviation kernel is used to test general relativity on simulated and GWTC-3 binary black hole signals, finding no evidence for deviations and limiting strain deviations to 7% for one event.
LCO achieved rapid response and adequate depth for kilonovae to 250 Mpc in O3/O4 but the galaxy-targeted strategy was less efficient than expected because GW localizations exceeded prior assumptions.
No coincident GW signals found with long GRBs in O3 run; luminosity distance limits set assuming binary merger powering.
Extended-data Bayesian reanalysis of GW190814 finds no evidence for tertiary-induced line-of-sight acceleration or residual eccentricity due to strong degeneracy between the two effects.
citing papers explorer
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GW231123: a Binary Black Hole Merger with Total Mass 190-265 $M_{\odot}$
A new gravitational wave event reveals a binary black hole merger with total mass 190-265 solar masses, indicating black holes can form via gravitational-wave driven mergers beyond standard stellar channels.
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A Gaussian process framework for testing general relativity with gravitational waves
A Gaussian process framework with a localized-deviation kernel is used to test general relativity on simulated and GWTC-3 binary black hole signals, finding no evidence for deviations and limiting strain deviations to 7% for one event.
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Las Cumbres Observatory Gravitational-Wave Follow-up in O3 and O4: Strengths and Weaknesses of a Rapid Response Galaxy Targeted Strategy
LCO achieved rapid response and adequate depth for kilonovae to 250 Mpc in O3/O4 but the galaxy-targeted strategy was less efficient than expected because GW localizations exceeded prior assumptions.
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Searching for gravitational waves from compact binary mergers powering long gamma-ray bursts during LIGO-Virgo-KAGRA's O3 run
No coincident GW signals found with long GRBs in O3 run; luminosity distance limits set assuming binary merger powering.
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On the Presence of a Tertiary Compact Object in GW190814
Extended-data Bayesian reanalysis of GW190814 finds no evidence for tertiary-induced line-of-sight acceleration or residual eccentricity due to strong degeneracy between the two effects.