A search for planets in the old open cluster NGC 6791
Bibliographic record
Abstract
\n We describe the results of a search for \n transit-like events caused by giant planets occulting\n stars in the old, metal-rich open cluster\n NGC 6791 based on BVI-colour photometry from eight nights of \n observations with the\n 2.54 m Nordic Optical Telescope. To extract the light curves \n we have used both PSF photometry (daophot) and the difference \n imaging technique (isis). We have re-analyzed\n observations from earlier campaigns to search for multiple\n transits, determine periods of long-period \n variables, and detect eclipsing binaries. \n We confirm 20 known variables and have discovered 22 new low-amplitude \n variables with amplitudes in the range 7–40 mmag and periods\n 1–16 days. We have found the primary and secondary \n eclipses of two eclipsing binaries based on the new and\n older photometric campaigns. The search for transit-like events has turned up\n a few single-transit candidates. The transit depths are\n 10 mmag in both the V and I filters over periods of 1.0–2.5 hours, \n but future observations are required to see whether identical\n transit-like events recur in these same stars. \n \n \n
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| 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 | 0.000 |
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".