griddetect
This program takes a number of XMM-Newton pointings, divides them according to a grid specified by the user, and repeatedly performs source detection with emldetect in all cells of the grid.
At each emldetect run, all pointings overlapping within a cell are used, but only the sources within the cells are kept. The final catalogue is the union of the sources detected in each cell.
The grid is defined by specifiying the coordinates of the cracks (i.e., the lines dividing the cells) and a rotation angle, as in the following picture:
where each circle is a pointing and the red dashed lines are the grid cracks. The blue area highlights a detection cell, and the yellow circles are the pointings overlapping with the cell and used for the detection in the cell.
More information on its science use cases and on how it works is provided in the paper "The XMM-Newton survey in the H-ATLAS field", accepted for publication by Astronomy&Astrophysics.
USAGE
A manual is in preparation. For the moment, for more information please see the documentation on github, from where the code can also be downloaded.
You are welcome to contact me (pranalli.github@gmail.com) for further information to get help on installing and running griddetect.
AUTHOR
Piero Ranalli
Post-doc researcher at IAASARS, National Observatory of Athens, Greece; Associate of INAF -- Osservatorio Astronomico di Bologna, Italy.
LICENSE
Copyright (C) 2014-2015 Piero Ranalli
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
Last updated: 2015-2-4.