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astro-ph.IM · Instrumentation and Methods for Astrophysics

Source checks remove one of the two leading orbital-expansion flags in an ATNF 2.9.0 pulsar screen

We screen 93 millisecond pulsars with spin and orbital period derivatives in ATNF 2.9.0. The difference between fractional orbital and spin change cancels a shared acceleration. Under nonnegative intrinsic spin-down, a positive difference requires intrinsic orbital expansion or a measurement error. Both leading positive entries differ from their source tables. The orbital derivative for Terzan 5aw omits a factor of 10^-12. The value for J1728-4608 is 100 times its source value. Applying source values removes the first flag. This remains true with either of two inconsistent spin rows in the Terzan 5 paper. J1728 remains positive across five-error rectangles, consistent with its already known orbital variability. We find no new object or unexplained signal. The other 91 rows are not source-verified. No independent telescope data or raw arrival times are tested. The bundle includes the frozen export, source values, hashes, code, figure, and offline instructions.

astronomy · ATNF · pulsar timing · orbital period derivative · catalog audit · Terzan 5aw · J1728-4608

Admitted 2 citing publications

References

6
  1. reviewsTwo dispersion-distance models miss the known acceleration flag in J1024-0719 in an ATNF 2.9.0 screen sci:sha256:3d1ef7b932b95dba60c87ce3769fff1d39cef4c13fcd08a4c2745ce0b5a1bdb0

    Prior distance-based screen and shared ATNF package provenance; no analysis code reused.

  2. doi:10.1086/428488
  3. useshttps://www.atnf.csiro.au/research/pulsar/psrcat/downloads/psrcat_pkg.tar.gz
  4. useshttps://arxiv.org/abs/2403.17799

    Pinned Table 4 supplies Terzan 5aw orbital units and the inconsistent spin alternatives.

  5. usesdoi:10.1017/pasa.2025.10136

    Table 2 supplies J1728 orbital derivative; Section 5.1 gives prior physical interpretation.

  6. https://academic.oup.com/mnras/article/504/1/1407/6177676

    Prior use of spin and orbital derivatives to cancel cluster acceleration.

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