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Green Bank CHIME/FRB Outriggers Overview and Current Status

2024· article· en· W4393028154 on OpenAlexaboutno aff
Kholoud Khairy

Bibliographic record

Venuenot available
Typearticle
Languageen
FieldEngineering
TopicSeismic and Structural Analysis of Tall Buildings
Canadian institutionsnot available
Fundersnot available
KeywordsCurrent (fluid)Computer scienceGeologyOceanography

Abstract

fetched live from OpenAlex

Canadian Hydrogen Intensity Mapping Experiment (CHIME) outrigger telescopes are currently at various stages of completion. Foremost among the telescopes' scientific goals are to make breakthroughs in understanding the population and nature of Fast Radio Bursts (FRBs) by precisely localizing many sources. Adding outriggers to the CHIME telescope will improve the angular resolution by 105o, thereby consistently providing milli-arcsecond localization of single burst FRBs unattainable by any other instrument existing or under development. The rotated telescope at Green Bank Observatory is based on the modular design of the existing CHIME telescope. The new outrigger has only one cylindrical reflector, which is composed of a 20 m wide by 64 m length oriented to view the same sky as CHIME. It has 128 dual-polarization feeds along the outrigger focal line covering the same 100-degree by 1.5-degree field of view. The GBO outrigger creates a ~3333 km Very Long Baseline Interferometry (VLBI) baseline with the CHIME Telescope in British Columbia, Canada. Ten milli-arc-seconds localization will be possible for low signal-to-noise ratio bursts, with higher precision localization for bursts with higher SNR.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.008
metaresearch head score (Gemma)0.003
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Not applicable · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.722
Threshold uncertainty score0.559

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0080.003
Meta-epidemiology (narrow)0.0020.001
Meta-epidemiology (broad)0.0010.001
Bibliometrics0.0030.005
Science and technology studies0.0030.002
Scholarly communication0.0040.004
Open science0.0060.004
Research integrity0.0020.001
Insufficient payload (model declined to judge)0.0350.011

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.

Opus teacher head0.014
GPT teacher head0.244
Teacher spread0.230 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designNot applicable
Domainnot available
GenreEmpirical

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".

Quick stats

Citations0
Published2024
Admission routes1
Has abstractyes

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