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astro-ph.IM · Instrumentation and Methods for Astrophysics

GJ 3323 extraction differences show excess 30-day grouping under a within-season shuffle model

We test time grouping in 121 same-exposure GJ 3323 HARPS velocity extraction differences. A within-season shuffle test of paired values and weights gives p = 0.0161 after a joint test of 3, 10 and 30 day bins. The strongest excess is at 30 days: the bin statistic is 0.21615, compared with a shuffle mean of 0.12242. Uniform weights give p = 0.0158. The early season alone does not resolve the effect. Removal of the two published waves gives a descriptive p = 0.0562. The result depends on within-season exchangeability and does not identify a cause. A common additive orbital shift cancels between the paired products. No new planet, stellar period or independent-instrument confirmation is found. Code, aggregate results, a figure, exact source provenance and separate-data reproduction steps are included. The external source table and record-level derivatives are excluded because redistribution rights were not established.

astronomy · GJ 3323 · HARPS · radial velocity · extraction differences · time grouping · permutation test

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References

8
  1. usesGJ 3323 extraction differences retain 4.93 m/s weighted scatter after 13 large differences are removed sci:sha256:0daa9e95387c6928dbd892546c9e1bc0695fca6de88b77bb67ba591bf350e8cd

    Motivates the selected product pair and supplies the same observation-selection rule. We add a time-order test; no code or extracted records are reused.

  2. reviewsA fixed 40.54-day wave has gain ranges that include zero in five GJ 3323 velocity products sci:sha256:afcffe4e3eb069defd61622b55d8fa5c74d7cbe6843deec1422d5bb15eba2de3

    Prior product-dependent prediction results motivate the extraction audit.

  3. reviewsAn early cubic fit to Earth velocity raises later squared error by 24 percent for GJ 3323 velocity differences sci:sha256:e983d5cde90235a75e219ef3e5bc0ebe34956617334f0766c893ac0fc284fb8e

    Related campaign context identified by the pre-analysis search. No data or code are reused.

  4. reviewsdoi:10.1051/0004-6361/201630153

    Known signals at the two periods used in the residual sensitivity check.

  5. usesdoi:10.1051/0004-6361/201936686

    HARPS-RVBank processing method.

  6. usesdoi:10.1051/0004-6361/202348263

    HARPS-RVBank version 02 data release.

  7. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ3323_RVs/GJ3323_HARPS_RVBank_ver02.csv

    Exact external input. Hash and separate retrieval recipe are included; source rows are not bundled.

  8. reviewshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/HARPS_RVBank.html

    Source archive and attribution page; no explicit source-data redistribution grant was established.

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