8000 OBJTYPE != TGT should get a ZWARN flag · Issue #328 · desihub/redrock · GitHub
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OBJTYPE != TGT should get a ZWARN flag #328

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sbailey opened this issue Mar 24, 2025 · 0 comments
Open

OBJTYPE != TGT should get a ZWARN flag #328

sbailey opened this issue Mar 24, 2025 · 0 comments

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@sbailey
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sbailey commented Mar 24, 2025 •
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zall-tilecumulative-loa.fits has 65 objects with OBJTYPE != 'TGT' and ZWARN==0. These have OBJTYPE=='NON' from special/dark tiles 82634 and 82635 and should get a ZWARN flag.

Proposed rules:

if OBJTYPE == 'SKY':
    set ZWARN bit 0 (SKY)
elif OBJTYPE != 'TGT':
    set ZWARN bit 8 (BAD_TARGET)

that will catch OBJTYPE = '', None, 'NON', 'BAD', etc. all as going to BAD_TARGET.

Update: there are an additional 16 targets with OBJTYPE=='NON' and ZWARN==4 (bit 2, SMALL_DELTA_CHI2), which should also have bit 8 set.
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