Redshift localisation of the signal
Individual run · T-fc2be79199a2
Public summary of an internal test, not yet independently validated or published.
Question investigated
Is the preference for evolving dark energy in Pantheon+ and DES-SN5YR concentrated in one of the ranges z = 0.01–0.3; 0.3–2.3, with the prior Ωm = 0.33 ± 0.01?
Test conditions
The fit to each compilation (Pantheon+ and DES-SN5YR) is repeated after excluding, one at a time, the ranges z = 0.01–0.3; 0.3–2.3. The adopted prior is Ωm = 0.33 ± 0.01. BAO and cosmic microwave background constraints are held fixed. Fit quality and dark-energy parameters are compared before and after each exclusion. The ranges are specified before fitting.
Result
Excluding z = 0.01–0.3 from DES-SN5YR reduced the fit improvement by about 18%, the largest reduction among the exclusions tested. The preference persisted after each range was excluded. The conclusion applies to the compilations, ranges and assumptions examined.
Key figure
Reduction in fit improvement
18 %
DES-SN5YR: remove z = 0.01–0.3
Removing redshifts 0.01–0.3 reduced the fit improvement in DES-SN5YR by about 18%, the largest reduction in this comparison. The preference persisted in every tested removal. The result is limited to the tested data, bands and priors and does not establish exclusive dependence on a single band.
Source: Tower public snapshot
Specific limitations
- Excluding each range measures its influence on the preference for evolving dark energy. This comparison alone cannot identify a physical or instrumental origin.
- The point represents the largest reported reduction in fit improvement for this test; values for the other cuts are unavailable. The result depends on the redshift bin and prior used. Repeated analyses are not independent measurements, and the percentage is not a probability or statistical significance.
This run among the other public runs
The highlighted dot is this record. The other runs use other combinations of data and priors.
- DES-SN5YR
- Union3
- selected run
DES-SN5YRwithout z = 0.01–0.081 run
DES-SN5YRwithout z = 0.01–0.113 runs
DES-SN5YRwithout z = 0.01–0.1518 runs
DES-SN5YRwithout z = 0.023–0.151 run
DES-SN5YRwithout z = 0.01–0.24 runs
DES-SN5YRwithout z = 0.01–0.34 runs
Union3without z = 0.01–0.157 runs
Union3without z = 0.1–0.33 runs
Reduction in fit improvement when the range is removed (%)
- 51Public runs
- 18%DES-SN5YR · without z = 0.01–0.3
- 18%–95%Lowest and highest reduction
18%DES-SN5YR · without z = 0.01–0.3Open the record T-fc2be79199a2
View the data as a table
| Compilation | Range removed | Reduction (%) | Record |
|---|---|---|---|
| DES-SN5YR | z = 0.01–0.08 | 70 | T-e67a424b5ccf |
| DES-SN5YR | z = 0.01–0.1 | 59 | T-acf9f6789f6a |
| DES-SN5YR | z = 0.01–0.1 | 59 | T-e7ffb1c11d22 |
| DES-SN5YR | z = 0.01–0.1 | 75 | T-5ff8f1fd80a6 |
| DES-SN5YR | z = 0.01–0.1 | 75 | T-d06585fd0e12 |
| DES-SN5YR | z = 0.01–0.1 | 75 | T-fb9b6fc6e544 |
| DES-SN5YR | z = 0.01–0.1 | 91 | T-ce8e413902fb |
| DES-SN5YR | z = 0.01–0.1 | 91 | T-e6b06a801122 |
| DES-SN5YR | z = 0.01–0.1 | 93 | T-04a0ed4d9d28 |
| DES-SN5YR | z = 0.01–0.1 | 93 | T-afcb5fe45fad |
| DES-SN5YR | z = 0.01–0.1 | 93 | T-b97d826bd09f |
| DES-SN5YR | z = 0.01–0.1 | 93 | T-cd51b90ff68b |
| DES-SN5YR | z = 0.01–0.1 | 93 | T-cf7844375210 |
| DES-SN5YR | z = 0.01–0.1 | 93 | T-e33861adf6bf |
| DES-SN5YR | z = 0.01–0.15 | 58 | T-260500679d60 |
| DES-SN5YR | z = 0.01–0.15 | 58 | T-321b843a0e5c |
| DES-SN5YR | z = 0.01–0.15 | 58 | T-423f050911c9 |
| DES-SN5YR | z = 0.01–0.15 | 58 | T-df998f604c97 |
| DES-SN5YR | z = 0.01–0.15 | 58 | T-ed2ce44de389 |
| DES-SN5YR | z = 0.01–0.15 | 75 | T-1367215bcab5 |
| DES-SN5YR | z = 0.01–0.15 | 75 | T-363971e6e7a9 |
| DES-SN5YR | z = 0.01–0.15 | 75 | T-daadb81fcf35 |
| DES-SN5YR | z = 0.01–0.15 | 92 | T-5f0f73082b99 |
| DES-SN5YR | z = 0.01–0.15 | 92 | T-69658e6481b4 |
| DES-SN5YR | z = 0.01–0.15 | 94 | T-05ae703af393 |
| DES-SN5YR | z = 0.01–0.15 | 94 | T-4f3a81c57369 |
| DES-SN5YR | z = 0.01–0.15 | 94 | T-5f5380992840 |
| DES-SN5YR | z = 0.01–0.15 | 94 | T-ec2705915411 |
| DES-SN5YR | z = 0.01–0.15 | 94 | T-f15b202924b6 |
| DES-SN5YR | z = 0.01–0.15 | 95 | T-6630bd2ec70b |
| DES-SN5YR | z = 0.01–0.15 | 95 | T-d3c37bcfa041 |
| DES-SN5YR | z = 0.01–0.15 | 95 | T-d824203da16c |
| DES-SN5YR | z = 0.023–0.15 | 75 | T-78d38345542e |
| DES-SN5YR | z = 0.01–0.2 | 43 | T-28784a6e0dde |
| DES-SN5YR | z = 0.01–0.2 | 63 | T-3e3fa4c5d2da |
| DES-SN5YR | z = 0.01–0.2 | 63 | T-50a63dfd1576 |
| DES-SN5YR | z = 0.01–0.2 | 84 | T-87001adcb352 |
| DES-SN5YR | z = 0.01–0.3 | 18 | T-fc2be79199a2 |
| DES-SN5YR | z = 0.01–0.3 | 44 | T-0666056105a4 |
| DES-SN5YR | z = 0.01–0.3 | 44 | T-188a0c45ae9a |
| DES-SN5YR | z = 0.01–0.3 | 69 | T-0fe707d2a0c0 |
| Union3 | z = 0.01–0.15 | 33 | T-63817dc77958 |
| Union3 | z = 0.01–0.15 | 33 | T-c1650d8fd93c |
| Union3 | z = 0.01–0.15 | 42 | T-c55a31fdb4c9 |
| Union3 | z = 0.01–0.15 | 53 | T-f079e23f2559 |
| Union3 | z = 0.01–0.15 | 54 | T-3e9ad497d065 |
| Union3 | z = 0.01–0.15 | 54 | T-c8b48f8f5e39 |
| Union3 | z = 0.01–0.15 | 54 | T-cbe083892a0c |
| Union3 | z = 0.1–0.3 | 49 | T-5f1fd8c35732 |
| Union3 | z = 0.1–0.3 | 50 | T-3d4bc1b7fd17 |
| Union3 | z = 0.1–0.3 | 52 | T-6ff8a28ad5b0 |
51 public runs. Each dot is the key figure published for one run: the cut that most reduced the fit improvement in that configuration of data and priors. The other cuts of each run are not in the snapshot. Runs are not independent measurements, and the percentage is neither a probability nor a significance. Source: Tower public snapshot