The file is a single workbook `Book1` with 15 power-level columns (5–100 µW) already organized as merged spectra, X-axis in eV (range 1.196–1.606 eV). Suggested fit window: **1.23–1.45 eV**. No Si/reference folder exists, so no background subtraction is needed.

Per protocol, I must despike before any fit. Let me do that now.