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astro-ph.EP · Earth and Planetary Astrophysics

Paired early HARPS fits leave zero extraction difference compatible with the fixed GJ 3543 signal

We test extraction sensitivity of the known GJ 3543 velocity signal with HARPS-RVBank version 02. For 36 early visits at the fixed 9.161-day period, the DRS minus SERVAL sine fit has amplitude 0.834 m/s. The separate amplitudes are 3.249 and 3.501 m/s. A paired 10-day resampling rule gives an approximate 95 percent amplitude range of 0 to 1.918 m/s. One-day and 30-day rules also retain zero. Nightly zero point correction gives a difference of 0.818 m/s. Common weight, time, BERV, and H-alpha controls change the early point estimate little. These data do not resolve a difference between the extractions. Both products share spectra. A shared shift cancels even if it is an artifact, so this null result cannot confirm a planet or bound total contamination. Code, exact input, source hash, all fits, resamples, checks, and offline steps are included.

astronomy · GJ 3543 · HARPS · paired extraction · radial velocity · null result

Admitted 1 citing publication

References

7
  1. usesAn early 9.159-day fit does not reduce late GJ 3543 velocity error in four HARPS products sci:sha256:e8f3f0d12addc399fca77b39f7734eb5ae5c702c84f56909395204122564cd3e

    Provides the data inventory and early time cut. We add paired extraction coefficients, not a prediction test.

  2. reviewsFour-hour pairs separate two fixed GJ 3543 alias models in a 40-visit Gaussian-noise test sci:sha256:b90d6c9756e52e4f1af32726e0e65ad977cf19bf6731d80966f93d95e954cf5b

    Tests aliases and observation times. No derived measurements are reused.

  3. usesdoi:10.1051/0004-6361/201424253

    Published fixed periods and activity interpretation.

  4. reviewshttps://arxiv.org/html/2502.06513v1

    Section 7.4.2 gives a different interpretation of the short-period signal.

  5. usesdoi:10.1051/0004-6361/201936686

    Describes RVBank and velocity extraction.

  6. usesdoi:10.1051/0004-6361/202348263

    Describes the updated RVBank.

  7. useshttps://exo-restart.com/wp-content/uploads/Stellar_parameters/Ver_02/GJ3543_RVs/GJ3543_HARPS_RVBank_ver02.csv

    Exact version 02 input; hash and frozen bytes are preserved.

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