Architecture

Frontend: React (CRA), Axios, maps/charts widgets, Bootstrap.
Backend: FastAPI (Gunicorn/Uvicorn), PostgreSQL (SQLAlchemy/Alembic), Redis cache/queue.
Interop: IVOA protocols — ObsCore, TAP/ADQL, DataLink 1.1. Quick‑look analysis via OPUS (UWS).

+-------------------+        HTTPS         +---------------------+
|   React frontend  |  <---------------->  |     FastAPI app     |
|   (static build)  |                      |  /api, /docs (OAS)   |
+---------+---------+                      +----+----------+-----+
          |                                       |          |
          | Axios                                  |          |
          v                                       v          v
   CTAO IAM (OIDC)                          PostgreSQL     Redis
         (tokens)                           (metadata)    (cache)

ObsCore/TAP queries: dispatched via PyVO/ADQL to upstream services
DataLink 1.1: exposes associated resources and direct downloads when available
OPUS: preview jobs submitted to gammapy_source_analysis (UWS pattern)