Proper Motion Significance Sigma per Year Classifier
Single signed proper-motion component significance vs caller review threshold, not full 2 Dcovariance likelihood or astrophysical detection guarantee. Caller independently establishes frames, units, epoch, covariance and instrument context; not an identity, association or astrometric quality certification.
Description
A component's significance compares signed motion with its independently measured uncertainty.
A component's significance compares signed motion with its independently measured uncertainty.1
A threshold screen does not assess a full two-dimensional covariance or cause of motion. Use Proper Motion Significance Sigma per Year Classifier to evaluate the supplied inputs under the model explained below.
When to use Proper Motion Significance Sigma per Year Classifier
Use Proper Motion Significance Sigma per Year Classifier to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.
How to use Proper Motion Significance Sigma per Year Classifier and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Observed signed component mas per year, Independently measured sigma mas per year, Caller absolute sigma review threshold using the field table and validation rules below, then run the tool.
- Read Signed significance, Caller review threshold reached; interpret the units, signs, ordering and unknown-value placeholders described below.
- Correct reported input errors and rerun. Apply successful results according to their specific meanings and check the assumptions before using them in a decision.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedSignedComponentMasPerYear | Observed signed component mas per year | number | Required; constraints below |
| independentlyMeasuredSigmaMasPerYear | Independently measured sigma mas per year | number | Required; constraints below |
| callerAbsoluteSigmaReviewThreshold | Caller absolute sigma review threshold | number | Required; constraints below |
Enter finite signed component motion in mas/year, positive sigma in mas/year and positive caller sigma threshold. Divide motion by sigma; flag abs(significance)≥threshold. No combined-vector covariance, statistical confidence calculation or installed significance class occurs.
signedSignificance=component/sigma; review=abs(significance)≥threshold Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| signedSignificance | Signed significance | number |
| callerReviewThresholdReached | Caller review threshold reached | boolean |
{
"input": {
"observedSignedComponentMasPerYear": -10,
"independentlyMeasuredSigmaMasPerYear": 2,
"callerAbsoluteSigmaReviewThreshold": 3
},
"output": {
"signedSignificance": -5,
"callerReviewThresholdReached": true
}
}Limitations and assumptions
A threshold screen does not assess a full two-dimensional covariance or cause of motion. Apply the exact scope and assumptions explained above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are explained above; extremely large inputs or outputs can also be rejected. Input errors differ from successful false results, empty match lists and unknown-evidence placeholders.
Alternative or Complementary methods
Use High Proper Motion Star Threshold 180 mas/yr Flag Checker for a related task: A high-proper-motion flag compares a measured magnitude with a chosen catalog threshold.
Use Proper Motion Tangential Velocity Calculator for a related task: Proper motion and distance together determine a tangential speed under consistent units.
References
Similar or alternative tools
- High Proper Motion Star Threshold 180 mas/yr Flag Checker
A high-proper-motion flag compares a measured magnitude with a chosen catalog threshold.
- Proper Motion Tangential Velocity Calculator
Proper motion and distance together determine a tangential speed under consistent units.