First science results with a new, inexpensive liquid crystal polarimeter module for the DAO 1.8m telescope
Why this work is in the frame
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Bibliographic record
Abstract
A new polarimeter module has been built for the Dominion Astrophysical Observatory's (DAO) 1.8m Plaskett telescope for a hardware cost, including spare components, of approximately CDN$5,000. Implemented as a plug-in addition to the telescope's existing Cassegrain spectrograph, the device is being used to obtain medium resolution (R ≈ 10;000) circular spectropolarimetry of stars in an approximately 280Å wide wavelength region centered on the Hβ line. The intermediate resolution of the spectrograph permits stellar longitudinal magnetic field measurements to be made with both single or multiple strong metallic lines as well as the Hβ line. The instrument's dual-beam design together with fast switching of the liquid crystal wave plate (up to 100 Hz) synchronized with charge shuffling on the CCD is used to significantly reduce instrumental effects and achieve high precision polarimetric measurements. In this paper we present the first new science results obtained with the instrument. These include the discovery of a strong magnetic field and co-rotating magnetosphere in the helium-weak star HD176582, the detection of several new magnetic stars, and a study of the observed (and occasionally very large) differences in stellar longitudinal magnetic fields as measured with the Hβ line and metallic lines.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it