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
_healpix_29 int64 | spectrum dict | VDISP float32 | VDISP_ERR float32 | Z float32 | Z_ERR float32 | ra float64 | dec float64 | healpix int64 | ZWARNING bool | SPECTROFLUX_U float32 | SPECTROFLUX_G float32 | SPECTROFLUX_R float32 | SPECTROFLUX_I float32 | SPECTROFLUX_Z float32 | SPECTROFLUX_IVAR_U float32 | SPECTROFLUX_IVAR_G float32 | SPECTROFLUX_IVAR_R float32 | SPECTROFLUX_IVAR_I float32 | SPECTROFLUX_IVAR_Z float32 | SPECTROSYNFLUX_U float32 | SPECTROSYNFLUX_G float32 | SPECTROSYNFLUX_R float32 | SPECTROSYNFLUX_I float32 | SPECTROSYNFLUX_Z float32 | SPECTROSYNFLUX_IVAR_U float32 | SPECTROSYNFLUX_IVAR_G float32 | SPECTROSYNFLUX_IVAR_R float32 | SPECTROSYNFLUX_IVAR_I float32 | SPECTROSYNFLUX_IVAR_Z float32 | object_id large_string |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
37,904,641,407,228,680 | {"flux":[6.09354829788208,6.095827579498291,6.0981059074401855,6.10038423538208,6.102662563323975,6.(...TRUNCATED) | 198.451996 | 12.089855 | 0.090935 | 0.00003 | 33.85404 | 14.426352 | 33 | false | 5.239501 | 24.568989 | 72.531418 | 110.077858 | 144.915009 | 1.466416 | 1.475812 | 1.459633 | 1.068219 | 0.580823 | 3.416085 | 24.833179 | 71.878273 | 110.237198 | 145.572006 | 2.856889 | 1.498636 | 1.47298 | 1.173795 | 0.647683 | b' 482050393342240768' |
1,325,005,904,641,585,400 | {"flux":[13.194368362426758,13.193832397460938,13.193296432495117,13.192760467529297,13.192224502563(...TRUNCATED) | 185.366852 | 7.866636 | 0.079438 | 0.000021 | 344.2829 | -1.006265 | 1,176 | false | 13.175896 | 42.436443 | 104.612465 | 155.637833 | 204.530655 | 1.463366 | 1.997012 | 1.406713 | 0.61518 | 0.275811 | 10.284412 | 42.373226 | 104.374016 | 155.457245 | 202.638977 | 2.712468 | 2.022798 | 1.48239 | 0.737588 | 0.332556 | b' 427922808769636352' |
168,688,995,934 | {"flux":[-0.5977112054824829,-0.5976599454879761,-0.597608745098114,-0.5975576639175415,-0.130981609(...TRUNCATED) | 297.325439 | 67.703072 | 0.468462 | 0.000141 | 44.99191 | 0.040806 | 0 | false | 0.2724 | 0.859473 | 4.027554 | 8.229003 | 13.182512 | 2.831457 | 7.186713 | 3.977472 | 1.931328 | 0.81686 | 0.425684 | 0.813264 | 3.966642 | 8.38334 | 13.444562 | 6.184954 | 7.202161 | 4.825853 | 2.676999 | 1.301346 | b' 909845914867230720' |
1,263,912,877,127 | {"flux":[16.363224029541016,16.364404678344727,16.365583419799805,16.366762161254883,16.367938995361(...TRUNCATED) | 55.352123 | 22.274382 | 0.062189 | 0.000006 | 45.074931 | 0.110882 | 0 | false | 14.140302 | 29.679224 | 42.053524 | 54.868134 | 58.079845 | 1.097517 | 3.35799 | 2.874161 | 1.465873 | 0.675116 | 7.690519 | 29.695498 | 42.114391 | 54.396683 | 60.402206 | 2.979462 | 3.484305 | 2.762851 | 1.749405 | 0.955693 | b' 461629163778893824' |
1,565,546,106,783 | {"flux":[2.387021064758301,2.3868963718414307,2.3867714405059814,2.3866465091705322,2.38652110099792(...TRUNCATED) | 140.683716 | 73.105865 | 0.023953 | 0.000009 | 45.107567 | 0.15224 | 0 | false | 2.433388 | 4.209137 | 6.559794 | 8.509247 | 9.172297 | 2.577649 | 4.744826 | 3.602656 | 2.321602 | 1.01284 | 2.463428 | 4.162377 | 6.503908 | 8.355572 | 9.419517 | 3.85776 | 4.742488 | 3.700364 | 2.747732 | 1.180715 | b' 903032236830386176' |
1,758,499,804,555 | {"flux":[0.8113284707069397,0.8110477328300476,0.8107672333717346,0.8104872107505798,0.8102075457572(...TRUNCATED) | 301.31189 | 58.133793 | 0.102657 | 0.000018 | 45.061474 | 0.149827 | 0 | false | 1.072828 | 2.379128 | 4.137443 | 5.499845 | 5.8763 | 0.526906 | 3.242647 | 2.040025 | 1.492325 | 0.811559 | 0.322645 | 2.363554 | 4.090913 | 5.236898 | 5.436391 | 2.58134 | 3.205192 | 2.171211 | 1.654744 | 0.949908 | b' 1758828878773643264' |
1,847,241,851,340 | {"flux":[0.545579731464386,0.5455336570739746,0.5454877018928528,0.545441746711731,0.545395910739898(...TRUNCATED) | 119.033798 | 32.434284 | 0.23476 | 0.000014 | 45.017189 | 0.155804 | 0 | false | 1.435939 | 3.854031 | 9.116503 | 13.83067 | 17.06275 | 2.831457 | 7.186713 | 3.977472 | 1.931328 | 0.81686 | 1.733085 | 3.841493 | 9.060639 | 14.094426 | 17.366337 | 6.184954 | 7.202161 | 4.825853 | 2.676999 | 1.301346 | b' 909845090233509888' |
2,131,060,984,384 | {"flux":[-1.316123604774475,-1.3156707286834717,-1.3152185678482056,-1.3147668838500977,-1.314315915(...TRUNCATED) | 713.202271 | 119.925072 | 0.067225 | 0.000011 | 45.08675 | 0.189228 | 0 | false | 1.054823 | 3.136947 | 5.204364 | 7.193402 | 7.411766 | 0.526906 | 3.242647 | 2.040025 | 1.492325 | 0.811559 | 0.36141 | 3.136644 | 5.258018 | 6.901075 | 7.895223 | 2.58134 | 3.205192 | 2.171211 | 1.654744 | 0.949908 | b' 1758828054139922432' |
2,363,243,345,129 | {"flux":[-0.2210555225610733,-0.2209860384464264,-0.2209167182445526,-0.22084751725196838,-0.2207783(...TRUNCATED) | 87.1996 | 36.975075 | 0.194608 | 0.000053 | 44.895836 | 0.110981 | 0 | false | 0.426973 | 3.050235 | 8.852505 | 14.063801 | 17.944529 | 1.281084 | 4.709234 | 3.376928 | 1.6309 | 0.493779 | 0.648283 | 2.979646 | 8.935369 | 14.031592 | 17.937725 | 3.120175 | 4.824049 | 3.766461 | 1.98048 | 1.067923 | b' 1759858019794970624' |
4,420,335,235,391 | {"flux":[4.918327808380127,4.9178242683410645,4.572731018066406,4.2277092933654785,-1.47031092643737(...TRUNCATED) | 226.31459 | 22.775946 | 0.383299 | 0.000047 | 45.192069 | 0.165721 | 0 | false | 1.075313 | 3.346412 | 15.446788 | 24.124475 | 31.527817 | 2.831457 | 7.186713 | 3.977472 | 1.931328 | 0.81686 | 0.881378 | 3.450626 | 15.25593 | 24.515247 | 32.284882 | 6.184954 | 7.202161 | 4.825853 | 2.676999 | 1.301346 | b' 909856909983508480' |
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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.
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