uk.ac.starlink.table.join

Interface FixedRadiusConePixer

public interface FixedRadiusConePixer

Can calculate which sky pixels fall within a cone of variable radius.

Since:

10 May 2022

Author:

Mark Taylor

Method Summary

Modifier and Type	Method and Description
Object[]	getPixels(double alpha, double delta) Returns an array of objects representing pixels in a fixed-radius cone around a given sky position.

Method Detail

getPixels

Object[] getPixels(double alpha,
                   double delta)

Returns an array of objects representing pixels in a fixed-radius cone around a given sky position. Any pixels overlapping the cone must be returned; additional pixels (false positives) may also be returned. The output objects must implement the equals and hashCode methods appropriately, so that objects returned from one call can be compared for identity with objects returned from a subsequent call.

Instances of this class are not thread-safe, and should not be used concurrently from multiple threads.

Parameters:

alpha - right ascension of circle centre in radians

delta - declination of circle centre in radians

Returns:

array of comparable pixel objects