Introduction | Reduction | Conversions | Dates | Display Image | Headers | Image Load | Image Save | Photometry |

Table of Contents

This package contains functions useful in photometry calculations.

IsolateRegion[imobj, {i, j}, r] | Returns a submatrix of the supplied FITS image object that is centered at {i, j} and has width and height, r. |

Photometry[imobj, {x, y}, rad] | Sums up all of the pixel values in the specified FITS data object that are centered at {x, y} and that lie within a circular aperture with radius, rad. |

Phase[imobj, knownmin, orbper] | Returns the orbital phase of an object based on information in the header of the FITS image object. The HJD of a known minimum, knownmin, and the orbital period in days, orbper, are also required. |

Photometry calculations

This loads the package

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This loads the packages for image loading and display.

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This loads the data and displays it.

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Here is an isolated subset of the above data.

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Pixel sums can be performed as follows

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For sources with known orbital periods, the orbital phase of the data can be calculated.

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Created by Mathematica (October 24, 2004) |