GW150914 Binary black-hole merger
Replay the GW150914 detector data, compare processing choices, and keep a reproducible report. No wallet required.
One signal. Two ways to see it.
Change the frequency band and compare the same signal on identical axes.
How to explore this signal
- Listen and inspect. Start with the recorded H1 and L1 traces. Switch to raw strain, time–frequency, or lag to examine the same data.
- Change one setting. Run another frequency band and compare both results on the same scale. A stronger correlation is not a new detection.
- Keep it reproducible. Download your JSON report, import it, then reproduce it. Wallet signatures and chain receipts are optional.
Mass, distance, and sky views are published reference results. Filter changes do not recompute them.
Read the full workspace guideChecking the original input-file hashes…
Processed detector strain
Each detector normalized by its off-source RMS.
Calculating the arrival-time difference.
Alignment is a waveform diagnostic around a known event. It is not an independent detection, a significance estimate, or a sky-position measurement.
Mass, distance, and uncertainty.
8,350 official GWTC-1 posterior samples. No new Bayesian fit is run here.
Masses shown here are in the detector frame. The catalogue’s source-frame masses are different quantities. Download original posterior ↗
Where the signal could have come from.
Equatorial coordinates · probability density from the GWTC-1 FITS map.
This map comes from the published parameter-estimation analysis, not from the lag measured above. Displayed on a 1° grid; area is calculated from original pixels. Download original FITS ↗
Change the filter. Compare the evidence.
Overlay the same detector from two runs, at the same time and amplitude scale.
One signal, two processing choices.
Run a second frequency band to compare its waveform and diagnostics with the current run.
| Diagnostic | Baseline | Current | Change |
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A stronger correlation after a filter change is not evidence of greater detection significance. Compare the settings as well as the numbers.
Export or verify this runFrom recorded strain to a checkable result.
Original inputs, published reference products, and the numerical method behind this workspace.
H1 + L1 · 262,144 samples
Versioned code + explicit settings
Waveforms + diagnostics + digest
JavaScript and SciPy, compared.
Two implementations apply the same documented recipe to the same observed data. The release check compares unrounded waveforms, correlation curves, and reported diagnostics.
Loading the check record.
- Configurations checked
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- Max difference · normalized units
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- Peak lag sample
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Inspect the six configurations
| Band | Whitening | Line suppression | Max difference |
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This is a project-run numerical check, not an external scientific audit. It does not establish detection significance, validate all possible settings, or reproduce full Bayesian inference.
Source register
Files included with this releaseLoading the source register.
File digests identify the bundled release. They do not constitute a digital signature from GWOSC or the LIGO/Virgo Collaboration.
Run archive
Completed runs save automatically on this browser, up to 20. Reopening one recalculates it. Back up your runs before clearing browser data or moving to another device.
Your first verified run will appear here.
Analysis receipt
Keep JSON for reproduction or HTML for reading. You can also sign the report or record its digest on Base.
Run the analysis to create a report.Verify a report
Check its content digest and wallet signature, then rerun the same inputs. No wallet is needed for verification.
- Content fingerprint
- Not checked
- Wallet signature
- Not checked
- Calculation
- Not checked
- Chain inclusion
- Not checked
What does the blockchain add?
The transaction records a wallet’s commitment to this exact report digest in a specific block. A later edit produces a different digest. The JSON carries the actual results; anyone can rerun them here. Neither a signature nor a transaction establishes scientific correctness.
MERIDIAN community
A community exploring gravitational waves and open science. The lab is open to everyone, with no token required.
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0x234a1618785262813266c5a439dcab31da674d75Research materials
Data
GWOSC GWTC-1 release: 32 seconds of H1 and L1 strain at 4,096 Hz. File hashes are checked before each session’s first analysis.
Processing
Off-source Welch noise estimate, optional whitening, tapered frequency filter, optional line suppression. Each trace uses a fixed off-source RMS normalization.
Interpretation
Published posteriors and sky maps provide source context. The browser replay measures waveform diagnostics around an already known event; it does not reproduce the full Bayesian inference.