R4-7 axis-centered eight-sector production DS9 geometry verification: PASS
Monte Carlo samples: 2000000
Eight-sector union fraction: 1.000000000
Eight-sector gap fraction: 0.000000000
Eight-sector overlap fraction: 0.000000000
Deterministic cyclic adjacency and total span: PASS (360.000000 deg)
Disk/Wind physical axes are sector centers: W=270, N=0, E=90, S=180 deg sky PA
All six MOS exposure detector images: 48 ds9_to_xmmexpr angular widths are 45.000000 deg
Canonical detector expressions normalized to midpoint in [-180,180)
Independent coordconv center and three interior direction points per detector/sector: PASS
Positive wrap control 337.5->22.5 rejected as 315 deg; negative wrap -22.5->22.5 accepted as 45 deg
DS9-angle to celestial-PA correction applied: sky_PA=(DS9-90) mod 360
MOS2 mosaic assigned counts: 2547
MOS2 mosaic unassigned counts: 0
MOS2 mosaic multiply-assigned counts: 0
All MOS2 WCS count-weighted centroids lie inside their intended 45-deg sectors
No pairwise old-parent reconstruction was required or claimed
State: geometry gate only; 0/8 production spectra extracted