The help text claimed 0.99 is right for every synchrotron in the corpus.
Bending-magnet, superbend and wiggler sources are plausibly 0.8-0.95, no file
format read states the value reliably, and it cannot be fitted from a single
dataset (it correlates with spindle-symmetric absorption). Say what the number
is (degree p; XDS FRACTION_OF_POLARIZATION = (1+p)/2) and that a known
beamline value can be passed. Documentation only; the default stays 0.99.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D1G8gJVAy6gp1K5Dz3NE5C