GHaFaS: Galaxy Halpha Fabry-Perot Spectrometer for the WHT
Bibliographic record
Abstract
Abstract. A new scanning Fabry-Perot system will soon be available at the Nasmyth focus of the 4,2m William Hershell Telescope (WHT). It has been designed by the Laboratoire d’Astrophysique Expérimentale (LAE) in Montréal and is being built in collaboration with astronomers at the Instituto de Astrofísica de Canarias (IAC). The instrument will see first light at the beginning of July 2007. Description of the Projet GHaFaS is an improved version of the scanning Fabry-Perot system FaNTOmM (Hernandez et al. 2003), which is a resident instrument on the Observatoire du mont Mégantic (OMM) 1,6m telescope and which has also been used on the CFH and ESO La Silla 3,6m telescopes. The complete system is composed of a focal reducer, a calibration unit, a filter wheel for the order sorter filters, an FP etalon and an IPCS camera. The IPCS is composed of an Hamamatsu intensifier MCP tube which intensifies every generated electron coming from the photocatode by a factor 107. Each photon event, recorded on a DALSA CCD, is then analysed
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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 | 0.002 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.003 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.040 | 0.016 |
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".