Timing the Young Pulsar at the Centre of SNR 3C 58
Bibliographic record
Abstract
PSR J0205+6449 is a young, rotation‐powered pulsar located at the centre of the SNR 3C 58, widely believed to be the remnant of the historical supernova SN 1181. The neutron star is cooler than expected from standard cooling models [1] and the pulsar, though it has a very high spin‐down luminosity of Ė = 2.6×1037 ergs/s, has very low radio (L1400∼0.5 mJy kpc2 [2]) and X‐ray luminosities (LX = 2.06×1032 ergs/s [3]). We present 4 yrs of timing data spanning 5 yrs obtained with the Rossi X‐ray Timing Explorer, the Jodrell Bank Observatory and the Green Bank Telescope. We present phase‐coherent timing analyses showing significant timing noise that prevents a measurement of the ‘braking index’. In addition, we present two glitches observed in the source and discuss implications for the age and temperature of the neutron star.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".