OmniSky v1
Collection
Crossmatched, normalized multimodal astronomy: 20.4M DESI DR1 objects x 24 catalogs, 822 GB. Start with mmu-norm-index. • 20 items • Updated
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DESI EDR (SV3) spectra — L1 (release v1)
This L1 repository contains 1,060,507 spectra matched across the release, in 21 shards (about 80 GB).
Schema
spectrum struct per row: lambda (vacuum, barycentric, observer frame, Å; fixed 7,781-sample grid), flux (×10⁻¹⁷ erg s⁻¹ cm⁻² Å⁻¹), ivar, lsf_sigma (approximate line-spread σ per pixel), mask (native; nonzero = bad — verified), valid (mask==0 AND ivar>0 AND finite(flux)). Plus object_id (TARGETID), ra, dec, and source metadata columns.
Data notes
- The upstream data did not retain DESI's exact sparse resolution matrices or all native mask bits.
lsf_sigmais an approximate line-spread width; note this in resolution-sensitive work. - The spectra remain in the observed frame, without continuum normalization or dust correction.
DESI has a fixed wavelength grid. Its L2 preparation uses the training-split scaling statistics at mmu-norm-index → l2_stats/v1/desi_edr_sv3.json.
Credit: DESI Early Data Release (DESI Collaboration 2023). Sourced via Multimodal Universe.
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