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ajstewart / racs-historical-transients

Module to perform transient searches between RACS and SUMSS/NVSS.
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Sources not being removed from catalogue when convolving zero null images #83

Open ajstewart opened 4 years ago

ajstewart commented 4 years ago

When the boundary is zero's (rather than nan's) Aegean fails on the convolved image because it is trying to extract sources from the boundary region as they have not been cleared in the filter. My suspicion is that the convolving is doing something strange to the zero region.

ajstewart commented 4 years ago

There were two issues here:

  1. The zero filter was not running correctly with the inverse nature of the nan filter. This has been corrected.

  2. The convolving on 0 areas does indeed result in a non-zero area. The only solution here is to convert the 0's to NaN's before the convolution.

Screen Shot 2020-02-21 at 11 10 47 am
ajstewart commented 4 years ago

This issue is still present - but rather to the extent of in script convolution will not work with images that have the 0.0 boundary value.