Loud signals are perfect for testing Einstein's theory of general relativity.

The previous loudest signal was #GW230814 with a signal-to-noise ratio of 42. #GW250114 has a signal-to-noise ratio of 80. This enables some extremely precise tests!

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#O4IsHere

Our detailed study of #GW230814 is out

arxiv.org/abs/2509.07348

We can precisely test general relativity with this loud signal. Most tests show agreement with Einstein's theory, but some…

The deviations can be explained by detector noise. Having multiple detectors is important!

🔭🧪⚛️☄️ #GWTC4

#GW230814 is such a beautifully loud signal. An signal-to-noise ration of 42 using just one detector! That is louder than GW170817 observed with three. It is amazing the progress the detectors are making, and the science that these measurements can bring

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The gravitational-wave signal GW230814. The top panel shows the time-frequency representation of the signal where brighter regions indicate larger amplitude. The CWT acronym points to the method used to construct this time-frequency representation, based on the Continuous Wavelet Transform. The bottom panel shows the signal represented as a time series. The blue and purple lines show two different methods of reconstruction for the signal waveform. It is clear that the signal is a compact binary coalescence and the data are in good agreement with the reconstructions until the ringdown part. Being such a loud signal allows us to make this wonderfully precise reconstruction!

The loudest #GravitationalWave in #GWTC4 is #GW230814

Detected with only Livingston, it was still about twice as loud as GW150914!

Being loud should enable precision tests of general relativity, but with only one detector, you need to be careful with the analysis

ligo.org/science-summ...

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