ModelShift

java.lang.Object
- util.PropertyContainer
- - stella.adapter.AbstractPinholeShift
  - - stella.adapter.ModelShift

All Implemented Interfaces:

Cloneable, PinholeShift, Initializable, PropertySupplying
```
public class ModelShift
extends AbstractPinholeShift
```
Class that determines the pixel shift between pinhole and star by modelling the star plus pinhole. The star is a proportional to the Moffat function,
```
 psf(r)=(β-1)/πα²[1+(r/α)²]^-β,
 
```
where FWHM = 2α√(2^1/β-1).
Subtracted from that is a pinhole, which is modeled with an arctan according to
```
 ph(r)=1+(atan(k*(x-FWHM/2))-atan(k*(x+FWHM/2)))/π,
 
```
where bigger k's mean steeper slope. Additionally to the shift of the pinhole, we also get a hold on the seeing and total flux of the star, but no hold on pinhole drifts.

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`ModelShift.PinholeShift` A pinhole model is the model of a star with fitted intensity and FWHM close to the fixed pinhole position at the given coordinates.
`static class`	`ModelShift.Test` Test class.

Nested classes/interfaces inherited from class stella.adapter.AbstractPinholeShift
AbstractPinholeShift.Background, AbstractPinholeShift.Evaluate, AbstractPinholeShift.Reconstruct

Field Summary

Fields
Modifier and Type	Field and Description
`private static double`	`DEFMOFFATBETA` The moffat-beta, 4.765 is literature value.
`private static double`	`DEFPINHOLEDEEP` Broad-band anti-reflective coating, typically.
`private static double`	`DEFPINHOLESIZE` Default size (FWHM) of pinhole, pixel.
`private static double`	`DEFPINHOLESTEEP` Pinhole model steepness.
`private static boolean`	`DEFUSESIMPLEX` Default we are not using simplex.
`static String`	`KEY_MOFFATBETA` The moffat-beta, 4.765 is literature value.
`static String`	`KEY_PINHOLEDEEP` The pinhole model minimum transmission .
`static String`	`KEY_PINHOLESIZE` The pinhole diameter.
`static String`	`KEY_PINHOLESTEEP` The pinhole model steepness .
`static String`	`KEY_USESIMPLEX` If false, we use Levenberg-Marquardt algorithm, otherwise Simplex.
`private VectorG`	`last` The last solution.
`private ModelShift.PinholeShift`	`pin`

Fields inherited from class stella.adapter.AbstractPinholeShift
KEY_ADNOISE, KEY_APPLICABLE, KEY_GAIN, KEY_PINHOLE, KEY_SIGMACLIP, KEY_SKYTHICK

Fields inherited from class util.PropertyContainer
KEY_LISTSEPARATOR, KEY_MAPKEYVALUECHAR, KEY_MAPSEPARATOR

Fields inherited from interface util.PropertySupplying
CONFIG, KEY_CLASS

Constructor Summary

Constructors
Constructor and Description

ModelShift(Map<String,String> prop)
Constructs a model-shift.

Constructors
Constructor and Description
`ModelShift(Map<String,String> prop)` Constructs a model-shift.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`Vector2D`	`getBackground(MImageHDU hdu)` This method calculates the background as the median of a frame at the outer edge of the applicable window.
`double`	`getFlux()` Returns the total flux from the last solution, if possible.
`double`	`getFwhm()` Returns the fwhm from the last solution, if possible.
`Point2D`	`initFiberView(MFits ccd)` Returns the center of gravity shift of the image from the pinhole position.
`Point2D`	`solveFiberView()` Finally dolves for the pinhole shift.

Methods inherited from class stella.adapter.AbstractPinholeShift
backgroundFrameMean, backgroundFrameMedian, backgroundMean, backgroundMedian, getAduSignal, getApplicableWindow, getPinholePosition, getSignalToNoise, init

Methods inherited from class util.PropertyContainer
augment, augment, augment, augment, augment, clone, defaultBoolean, defaultChar, defaultDouble, defaultFloat, defaultInt, defaultLong, defaultObject, defaultObject, defaultProperties, defaultProperty, getAsBoolean, getAsChar, getAsDouble, getAsEnums, getAsFloat, getAsInt, getAsList, getAsLong, getAsMap, getAsMap, getAsObject, getAsObject, getProperties, getProperty, has, initProperties, isNew, parseObject, parseObject, reload, reload, removeProperty, requires, rescanned, setObject, setProperties, setProperty, stringProperties, toString

Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - KEY_MOFFATBETA
```
public static final String KEY_MOFFATBETA
```
    The moffat-beta, 4.765 is literature value.
    
    See Also:
    
    Constant Field Values
  - KEY_PINHOLESIZE
```
public static final String KEY_PINHOLESIZE
```
    The pinhole diameter.
    
    See Also:
    
    Constant Field Values
  - KEY_PINHOLESTEEP
```
public static final String KEY_PINHOLESTEEP
```
    The pinhole model steepness .
    
    See Also:
    
    Constant Field Values
  - KEY_PINHOLEDEEP
```
public static final String KEY_PINHOLEDEEP
```
    The pinhole model minimum transmission .
    
    See Also:
    
    Constant Field Values
  - KEY_USESIMPLEX
```
public static final String KEY_USESIMPLEX
```
    If false, we use Levenberg-Marquardt algorithm, otherwise Simplex.
    
    See Also:
    
    Constant Field Values
  - DEFMOFFATBETA
```
private static final double DEFMOFFATBETA
```
    The moffat-beta, 4.765 is literature value.
    
    See Also:
    
    Constant Field Values
  - DEFPINHOLESIZE
```
private static final double DEFPINHOLESIZE
```
    Default size (FWHM) of pinhole, pixel.
    
    See Also:
    
    Constant Field Values
  - DEFPINHOLESTEEP
```
private static final double DEFPINHOLESTEEP
```
    Pinhole model steepness.
    
    See Also:
    
    Constant Field Values
  - DEFPINHOLEDEEP
```
private static final double DEFPINHOLEDEEP
```
    Broad-band anti-reflective coating, typically.
    
    See Also:
    
    Constant Field Values
  - DEFUSESIMPLEX
```
private static final boolean DEFUSESIMPLEX
```
    Default we are not using simplex.
    
    See Also:
    
    Constant Field Values
  - last
```
private VectorG last
```
    The last solution.
  - pin
```
private ModelShift.PinholeShift pin
```
- Constructor Detail
  - ModelShift
```
public ModelShift(Map<String,String> prop)
```
    Constructs a model-shift.
- Method Detail
  - getBackground
```
public Vector2D getBackground(MImageHDU hdu)
```
    This method calculates the background as the median of a frame at the outer edge of the applicable window.
    
    Returns:
    
    The background ADU in x and its ADU-sigma in y.
  - initFiberView
```
public Point2D initFiberView(MFits ccd)
```
    Returns the center of gravity shift of the image from the pinhole position. The true center of gravity is scaled with two functions to return true shifts.
    
    Parameters:
    
    ccd - The image of the pinhole entrance
    
    Returns:
    
    The pixel shift from the pinhole center to the star in a first model.
  - solveFiberView
```
public Point2D solveFiberView()
```
    Description copied from interface: PinholeShift
    
    Finally dolves for the pinhole shift. Needs a call to PinholeShift.initFiberView(MFits) before.
    
    Returns:
    
    The pixel shift from the pinhole center to the star in the fitted model
  - getFlux
```
public double getFlux()
```
    Returns the total flux from the last solution, if possible.
    
    Specified by:
    
    getFlux in interface PinholeShift
    
    Overrides:
    
    getFlux in class AbstractPinholeShift
  - getFwhm
```
public double getFwhm()
```
    Returns the fwhm from the last solution, if possible.
    
    Specified by:
    
    getFwhm in interface PinholeShift
    
    Overrides:
    
    getFwhm in class AbstractPinholeShift

Class ModelShift

Nested Class Summary

Nested classes/interfaces inherited from class stella.adapter.AbstractPinholeShift

Field Summary

Fields inherited from class stella.adapter.AbstractPinholeShift

Fields inherited from class util.PropertyContainer

Fields inherited from interface util.PropertySupplying

Constructor Summary

Method Summary

Methods inherited from class stella.adapter.AbstractPinholeShift

Methods inherited from class util.PropertyContainer

Methods inherited from class java.lang.Object

Field Detail

KEY_MOFFATBETA

KEY_PINHOLESIZE

KEY_PINHOLESTEEP

KEY_PINHOLEDEEP

KEY_USESIMPLEX

DEFMOFFATBETA

DEFPINHOLESIZE

DEFPINHOLESTEEP

DEFPINHOLEDEEP

DEFUSESIMPLEX

last

pin

Constructor Detail

ModelShift

Method Detail

getBackground

initFiberView

solveFiberView

getFlux

getFwhm