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Populations
Each row is one simple stellar population (one IMF, metallicity, binary/single,
and α-mix). The id column is population_id in the API.
| id | Release | IMF | α / Mmax | Z | Type | α-mix | Products | |
|---|---|---|---|---|---|---|---|---|
| Loading… | ||||||||
Every ingested population carries provenance (source filename + SHA-256) — query
/api/v1/populations/{id} to see it.
Where the data come from
Spectra on this instance are computed from official BPASS releases (v2.2.1, and v2.3 where listed above). This site does not redistribute those archives. To run your own copy, clone the project source: the README covers install, ingest, and hosting.
The API
Fetch data downloads an SED, photometry, or the other
population tables for a chosen IMF, metallicity and age
(GET /api/v1/export).
Everything the UI displays comes from /api/v1 — open the
interactive API docs.
Pick a population_id from the table above. Ages are
log_age = log10(age/yr) on BPASS’s 0.1 dex grid
from 6.0 (1 Myr) to 11.0 (100 Gyr). SED fetches are native resolution
(the full 1 Å science grid).
Loading examples from this instance…Numbers in JSON responses are rounded to display precision; request CSV for full-precision spectra. The curl examples are filled from the catalogue above, so the ids stay valid after a re-ingest.
Licence
BPASS data: CC BY-NC 4.0, © the BPASS team. This interface: MIT. Bundled filter transmission curves come from the SVO Filter Profile Service. Cite Rodrigo, Solano & Bayo (2012) and Rodrigo & Solano (2020) if the filter set matters to the work.