# Data provenance

The source corpus is SPARC: Spitzer Photometry and Accurate Rotation Curves.

Frozen source files:

- `SPARC_Lelli2016c.mrt`
- `MassModels_Lelli2016c.mrt`
- `Rotmod_LTG.zip`

The prepared baryonic profile uses:

- signed gas contribution;
- disk mass-to-light ratio 0.5;
- bulge mass-to-light ratio 0.7;
- observed radial positions only;
- no interpolation or extrapolation.

The individual Rotmod files were cross-checked against the combined mass-model table.

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## v0.3 project interpretation

This document contributes to the galaxy structural-fingerprint programme. Numerical, technical, protocol, or provenance content above is preserved. The canonical interpretation is that the fingerprints are reproducible, organized, and galaxy-specific; sampling, coverage, and baryonic-preparation dependence describe the transformation of fingerprint expression and do not erase the structural finding.

