Redshift & Velocity Measurement

Step 3.1 — Compute z and recession velocity from spectral line shifts; cross-correlation against templates
Upload a spectrum image, extract a 1-D profile, then identify a line to measure its redshift.

Upload a spectrum image to begin.

Redshift Measurement

Click the spectrum chart to mark the observed line center, or type it below.

Cross-Correlation

Match the full spectrum against a spectral template to estimate redshift automatically.