Right now we are using a heuristic to reduce the threshold on sextractor sources (we divide the given threshold from the config file for DETECT_THRESH and ANALYSIS_THRESH by 3.0) otherwise no sources will be detected).
The correct thing to do is to use sqrt(sum(psf **2)) as the normalization factor, that for some reason, is not used by sextractor when it does the matched-filteing.
guynir42
commented
3 weeks ago
Right now we are using a heuristic to reduce the threshold on sextractor sources (we divide the given threshold from the config file for
DETECT_THRESHandANALYSIS_THRESHby 3.0) otherwise no sources will be detected).The correct thing to do is to use
sqrt(sum(psf **2))as the normalization factor, that for some reason, is not used by sextractor when it does the matched-filteing.