PKS 2149-306 and CXOCDFS J033225.3-274219: Two AGNs with Unusual Spectra Possibly Blueshifted?
Bibliographic record
Abstract
PKS 2149-306 and CXOCDFS J033225.3-274219 each exhibit several emission lines in their optical spectra from which their redshifts have been determined. However, an ASCA spectrum of the first object has detected an emission line at 5 keV observed wavelength, and the Chandra ACIS-I spectrum of the second object shows a very strong emission feature at the observed wavelength of 6.2 keV. The two lines cannot be identified with any known search line on the basis of their redshift values without invoking extremely large outflow bulk velocities of 0.6 c -0.75 c . Such high bulk velocities are practically unheard of in any other observations of extragalactic objects. We show here that all the lines in both the optical and X-ray spectra of the two objects can be identified with lines at longer wavelengths that are blueshifted. We propose a scenario in which the spectrum is blueshifted due to net apparent motion toward the observer, resulting from an ejection.
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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 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 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".