GNU Astronomy Utilities

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7.4.1 Detection and catalog production

Most other common tools in low-level astronomical data-analysis (for example SExtractor135) merge the two processes of detection and measurement into one. Gnuastro’s modularized methodology to separating detection from measurements is therefore new to many experienced astronomers and deserves a short review here. Further discussion on the benefits of this methodology can be seen in Akhlaghi [2016].

The raw output of any of the programs mentioned in MakeCatalog can be directly fed into MakeCatalog to get to a fast catalog. This is good when no further customization is necessary and you want a fast/simple catalog. But the modular approach taken by Gnuastro has many benefits that will become clear as you get more experienced in astronomical data analysis and want to be more creative in using your valuable data for the exciting scientific project you are working on. In short the reasons for this modularity can be classified as below:



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