Combine images with small position differences into a single SkyRegion

askap-vast / vast-pipeline

This repository holds the code of the Radio Transient detection pipeline for the VAST project.

https://vast-survey.org/vast-pipeline/

MIT License

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Combine images with small position differences into a single SkyRegion #752

Open mauch opened 2 months ago

mauch commented 2 months ago

The astrometric correction made to images can cause small offsets (<10 arcsec) between the values of (CRVALx) in their FITS headers even though they were observed with the same pointing centre. Its best to combine these into a single SkyRegion to avoid having one SkyRegion per input image in the pipeline.

Also make the desired maximum offset to search in order to combine images into a single SkyRegion configurable.