Without a resolution limit the outer d*^2 shells of the width measurement lie beyond the diffraction
limit, where the summed intensity is noise or even negative; one such shell made the whole measurement
fail, and 5 of 11 still-battery sets (sacla237, pal86, pal90, lcls242_s, lcls242_t) fell back to the
per-crystal window fit. A shell now enters the fit only where its summed intensity is measured to 10 %
(sum I / sigma >= 10), and at least three shells are needed.
Weighting the fit by the shells' signal instead was tried and rejected: it lets the strong low-resolution
shells set the width alone, and on the MicroMAX pink set the dimple R-free went 0.2442 -> 0.2748.
The matrix subsets, which are cut at their resolution, are unchanged within 0.0010 dimple R-free
(SwissFEL 0.2453, -C/-S 0.2513, mono 0.3188, pink 0.2442, SACLA 243 0.2455, SACLA 237 0.2327,
LCLS 222 0.2335, PAL 86 0.3628).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015CeEGgpKdfkCTJb3YNMJcu
leonarski_fandClaude Opus 5.5
b440e3792b