<i>RXTE</i>-BASED 35 DAY CYCLE TURN-ON TIMES FOR HERCULES X-1
Bibliographic record
Abstract
The 35 day X-ray cycle of Hercules X-1 (Her X-1) has been the subject of intense study since its discovery over 30 years ago. This work summarizes the results of determination of 35 day cycle turn-on (TO) times based on Rossi X-Ray Timing Explorer (RXTE) /All-Sky Monitor (ASM) observations of Her X-1. We apply a cross-correlation method to the entire ( RXTE /ASM) Her X-1 database acquired between 1996 February 20 and 2009 December 18. We obtain new TO times for 147 cycles, 94 of which have well-determined times. The results reveal a uniform distribution of TO times with orbital phase. This does not support previous results that suggest TO times cluster around a specific orbital phase, such as 0.2 or 0.7. We also find 35 day cycle lengths ranging from 33.2 days to 36.7 days, and an average cycle length of 34.7 days.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.004 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".