astro

Class Aggregation

java.lang.Object

astro.Aggregation

All Implemented Interfaces:

Serializable, Cloneable, Comparable<Aggregation>

public class Aggregation
extends Object
implements Serializable, Cloneable, Comparable<Aggregation>

Describes a clump of pixel in a CCD image, not necessarily a star. Can be sorted for magnitude

Author:

wooz

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private Point2D	center Location (on the CCD) where star was detected.
private double	mag Instrumental magnitude, decimal logarithm time 2.5 of flux.
private static long	serialVersionUID

Constructor Summary

Constructors

Constructor and Description
Aggregation(Point2D c, double m)

Method Summary

Modifier and Type	Method and Description
int	compareTo(Aggregation that) Compares two raw stars.
boolean	equals(Object other) Returns true if coordinates and magnitude are the same.
Point2D	getCenter() Returns the pixel coordinates of the star center.
double	getInstrumentalMagnitude() Returns the instrumental magnitude, a logarithmic measure of the brightness.
private void	readObject(ObjectInputStream stream) On deserialization, first read the hidden object definitions, then the Position of the center.
String	toString() Prints the coordinates and the magnitude, separated by spaces.
private void	writeObject(ObjectOutputStream stream) We customize object serialization.

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

center

private transient Point2D center

Location (on the CCD) where star was detected.

mag

private final double mag

Instrumental magnitude, decimal logarithm time 2.5 of flux.

Constructor Detail

Aggregation

public Aggregation(Point2D c,
                   double m)

Method Detail

getCenter

public Point2D getCenter()

Returns the pixel coordinates of the star center. This is a Point2D object to support non-integer positions.

Returns:

the center

getInstrumentalMagnitude

public double getInstrumentalMagnitude()

Returns the instrumental magnitude, a logarithmic measure of the brightness.

Returns:

the mag

toString

public String toString()

Prints the coordinates and the magnitude, separated by spaces.

Overrides:

toString in class Object

equals

public boolean equals(Object other)

Returns true if coordinates and magnitude are the same.

Overrides:

equals in class Object

compareTo

public int compareTo(Aggregation that)

Compares two raw stars. Orders according to the instrumental magnitude.

Specified by:

compareTo in interface Comparable<Aggregation>

writeObject

private void writeObject(ObjectOutputStream stream)
                  throws IOException

We customize object serialization. We serialize out the central position, as Point2D is strangely not serializable.

Throws:

IOException

readObject

private void readObject(ObjectInputStream stream)
                 throws IOException,
                        ClassNotFoundException

On deserialization, first read the hidden object definitions, then the Position of the center.

Throws:

IOException

ClassNotFoundException