Bibliographic record
Abstract
Background: Fermi-LAT’s 9-year data set of astrophysical gamma-rays (recently reprocessed) has revealed many new astrophysical sources. A closer analysis of one of these previously unseen sources, PSR J1930+1852 and associated pulsar wind nebula, G54.0+0.3, could help to confirm the gamma-ray emission mechanism of pulsars. Methods: An investigation and analysis of PSR J1930+1852 and PWN G54.0+0.3 using Fermi-LAT data and science tools using maximum likelihood fitting is detailed.Results: A 4.3 σ (p = 0.000017) excess above background was observed at the coordinates of the pulsar/pulsar wind nebula and the sources spectrum appears to be consistent with a single power law. Limitations: The sources in the models are modelled as point sources. Further studies may want to consider the possibility of extended sources in the modelled region. Conclusion: There is evidence for a Fermi-LAT detection of this pulsar wind nebula and the source spectrum appears to be consistent with a standard power law. An upper limit calculation predicts only about 100 events with energy above 1 GeV in the 9-year data set so a pulsation search was not conducted.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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".