kshitijd/mmu-norm-sdss
SDSS spectra — L1 (release v1) This L1 repository contains 271,966 spectra matched across the release, in 11 shards (about 15 GB). Schema spectrum struct per row: lambda (vacuum, heliocentric, observer frame, Å; variable length ≤ ~4,700), flux (×10⁻¹⁷ erg s⁻¹ cm⁻² Å⁻¹), ivar, lsf_sigma, mask (native; nonzero = bad — verified), valid. Plus object_id, positions, metadata. Padding: the upstream arrays used lambda = −1 with zero inverse variance for padding. Those… See the full description on the dataset page: https://huggingface.co/datasets/kshitijd/mmu-norm-sdss.
SDSS spectra — L1 (release v1)
This L1 repository contains 271,966 spectra matched across the release, in 11 shards (about 15 GB).
Schema
spectrum struct per row: lambda (vacuum, heliocentric, observer frame, Å; variable length ≤ ~4,700), flux (×10⁻¹⁷ erg s⁻¹ cm⁻² Å⁻¹), ivar, lsf_sigma, mask (native; nonzero = bad — verified), valid. Plus object_id, positions, metadata.
Padding: the upstream arrays used lambda = −1 with zero inverse variance for padding. Those samples are removed here.
Data notes
- The upstream data retain a collapsed AND mask. Full native OR-mask bits are unavailable.
kshitijd/mmu-l2-sdss provides the L2 view with 4,800 samples. Its padding uses valid=false and lambda=0. Training-split scaling statistics are in l2_stats/v1/sdss_sdss.json.
Credit: SDSS. Sourced via Multimodal Universe.