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DM-55017-v30: Add accommodations for crowded fields in coadd assembly and detection - #478

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laurenam merged 3 commits into
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tickets/DM-55017-v30
Jun 5, 2026
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DM-55017-v30: Add accommodations for crowded fields in coadd assembly and detection#478
laurenam merged 3 commits into
v30.0.xfrom
tickets/DM-55017-v30

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@laurenam laurenam commented Jun 4, 2026

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laurenam added 3 commits June 4, 2026 12:41
In the "bright" detection phase of the dynamic detection task, we
have encountered cases where a very large fraction of the pixels are
marked with DETECTED_NEGATIVE.  This seems to be due to background
over-subtraction in crowded fields (where this pathology is most
significant).  This adds a guard against such cases by imposing a
maximum allowed fraction of DETECTED_NEGATIVE pixels (in addition
to an independent maximum allowed fraction of DETECTED pixels in
this pass).  If this maximum is exceeded, the detection threshold
is iteratively increased until it falls below the threshold.
This fixes a bug where the override was getting ingored.
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laurenam merged commit 1fa17a6 into v30.0.x Jun 5, 2026
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laurenam deleted the tickets/DM-55017-v30 branch June 5, 2026 00:56
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