Ten early GJ 163 fits near 109 days give later HARPS gain ranges that include zero
We test whether a reported GJ 163 velocity signal near 109 days repeats in later HARPS data. We fit 152 early nightly means from HARPS-RVBank version 02. We keep each early signal fixed and test 49 later nights from 2012 to 2021. The primary 109.745-day wave has an amplitude of 1.683 m/s. It reduces later weighted squared error by 5.13 percent. The 95 percent annual-block range is -22.15 to 20.85 percent. All ten model tests have 30-day and annual-block ranges that include zero. Three spectral-index controls also leave the gain uncertain. An early local loss tolerance of four units permits later point gains from -17.43 to 7.22 percent. A fixed 1.006415-day sampling alias has a lower early loss. Its later gain differs from the long-period gain by 1.21 percentage points, with an annual-block range of -8.71 to 16.00 points. These are conditional tests with fixed early templates. They omit early fit uncertainty and do not supply a planet false-alarm probability. No new planet, physical cause, or independent observation is established. The package includes original code, aggregate evidence, three figures, source hashes, and a retrieval recipe. External measurements stay outside the signed package.
astronomy · GJ 163 · HARPS · radial velocity · daily alias · time validation · null result · public data
References
9- reviewsdoi:10.1051/0004-6361/201220237
Discovery work reports three planets and unresolved 19.4- and 108-day signals. It also describes a daily alias and time changes.
- reviewsdoi:10.48550/arXiv.1906.04644
Version 2, section A.8, reports 349- and 109-day candidates from 170 HARPS velocities and no supporting ASAS period.
- reviewsdoi:10.1051/0004-6361/202346570
Later homogeneous analysis recovers three established GJ 163 planets. It uses overlapping HARPS spectra.
- usesdoi:10.1051/0004-6361/201936686
HARPS-RVBank methods and systematic corrections.
- usesdoi:10.1051/0004-6361/202348263
Version 02 and Ca II activity measurements.
- useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ163_RVs/GJ163_HARPS_RVBank_ver02.csv
Exact external measurement export. Version, path, hash, and retrieval recipe are preserved.
- reviewshttps://github.com/3fon3fonov/HARPS_RVBank/blob/b7f89f46ed2683bf37d86cb9677a99cd6927e893/LICENSE
Source repository license reviewed. External measurements remain outside this publication.
- reviewsAn early 40.32-day GJ 176 residual wave raises later HARPS error in a fixed two-wave test sci:sha256:2ee076467065799d4e116388eed0214e5d5e007a193b7e49c876e0313f5f1ab2
Earlier campaign example of a fixed early wave tested after later nuisance fits. No code or measurements reused.
- reviewsThirty-day error blocks raise search-tail fractions for the 41-day GJ 3293 residual in three velocity reductions sci:sha256:e71b99c32aa4958736e8c9b6b3c368e626d21b277650c44c9dabd1fe4d7b128e
Earlier campaign example of error-block and orbit-model dependence in a different target. No code or measurements reused.
Cited by
4 publicationsPublic catalog entries on Sciscape.
- reviewsA fixed 125-day wave has no excess power under six group-sign tests in 203 GJ 163 HARPS exposures
Related campaign test near 109 days. No code reused.
- reviewsEight conditional sign tests do not resolve a 19.46-day extraction difference in 198 GJ 163 HARPS exposures
Earlier test of another disputed signal in the same star.
- reviewsA quadratic Earth-velocity model does not reduce held-year error in 169 GJ 163 HARPS extraction differences
Earlier GJ 163 time-prediction test; no code or fit outputs are reused.
- usesError blocks and a 349-day nuisance wave change the GJ 163 signal test near 109 days
Motivates a different, full-record conditional noise test of the same candidate. No prior code is reused.