wavelength listlengths 337 21.1k | flux listlengths 337 21.1k | flux_error listlengths 337 21.1k | spectrum_id stringlengths 32 32 | star_name stringclasses 150
values | star_name_raw stringclasses 249
values | ra float64 0.35 360 | dec float64 -80.11 66.4 | lambda_min float64 1.15k 7.86k | lambda_max float64 1.98k 8.79k | n_pixels int32 337 21.1k | spectral_resolution float64 2.97 45k ⌀ | spectral_resolution_measured float64 619 15.8k ⌀ | snr float64 3.11 35.1k | snr_continuum float64 4.16 194 ⌀ | snr_quality stringclasses 5
values | observation_date stringdate 1993-12-28 06:10:11 2025-12-12 18:50:25 | mjd float64 49.3k 61k | exposure_time float64 120 18k | temporal_quality stringclasses 1
value | spectrograph stringclasses 18
values | telescope stringclasses 48
values | detector stringclasses 34
values | instrument_setup stringclasses 129
values | instrument_confidence stringclasses 2
values | observer_type stringclasses 3
values | site_latitude float64 -41.3 54.7 ⌀ | site_longitude float64 -121.8 173 ⌀ | site_elevation float64 0 3k ⌀ | helio_velocity float64 -3.7 10.1 | bss_rqvh float64 -29.81 30.1 ⌀ | telluric_corrected stringclasses 8
values | normalized stringclasses 9
values | is_echelle_order bool 2
classes | fits_format stringclasses 1
value | split stringclasses 3
values |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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0... | cd30f0aa31b1caecc3ab62076ce09429 | 14 LAC | 14 lac | 342.590728 | 41.953394 | 6,481.584961 | 6,638.140625 | 2,749 | 13,640 | null | 153.160699 | null | good | 2013-08-01 23:20:10 | 56,505.988119 | 2,725 | good | LhiresIII | C9 | Atik460 | C9+LhiresIII+Atik460 | high | amateur | 43.9 | 5.7 | 600 | 0 | -17.2278 | no correction | no correction | false | bintable_spectrum | validation |
[7108.0498046875,7108.10009765625,7108.14990234375,7108.2001953125,7108.25,7108.2998046875,7108.3500(...TRUNCATED) | [0.9590948224067688,0.955964207649231,0.9573988318443298,0.9659968018531799,0.9745880365371704,0.983(...TRUNCATED) | [0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0(...TRUNCATED) | 79007cf65d96ed41d6a9499857e139fe | 14 LAC | 14 Lac | 342.590728 | 41.953394 | 7,108.049805 | 7,317.649902 | 4,192 | 11,000 | null | 423.39776 | null | excellent | 2013-09-21 21:33:36 | 56,556.919381 | 3,635 | good | eShel | C14 | Atik460 | C14+eShel+Atik460 | high | amateur | 45.4 | -5.4 | 500 | 0 | -1.9694 | None | None | true | bintable_spectrum | validation |
[6884.5,6884.5498046875,6884.60009765625,6884.64990234375,6884.7001953125,6884.75,6884.7998046875,68(...TRUNCATED) | [1.1178643703460693,1.1134812831878662,1.1090964078903198,1.1065971851348877,1.1043275594711304,1.10(...TRUNCATED) | [0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0(...TRUNCATED) | aaae435cc96d33e06262d0042c09b694 | 14 LAC | 14 Lac | 342.590728 | 41.953394 | 6,884.5 | 7,109.700195 | 4,504 | 11,000 | null | 454.953978 | null | excellent | 2013-09-21 21:33:36 | 56,556.919381 | 3,635 | good | eShel | C14 | Atik460 | C14+eShel+Atik460 | high | amateur | 45.4 | -5.4 | 500 | 0 | -1.9694 | None | None | true | bintable_spectrum | validation |
[6684.0498046875,6684.10009765625,6684.14990234375,6684.2001953125,6684.25,6684.2998046875,6684.3500(...TRUNCATED) | [1.010731816291809,1.0077259540557861,1.0047211647033691,1.0017173290252686,0.9987145066261292,1.005(...TRUNCATED) | [0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0(...TRUNCATED) | 60b91344914e9dc5b658abb01c1034b9 | 14 LAC | 14 Lac | 342.590728 | 41.953394 | 6,684.049805 | 6,896.350098 | 4,246 | 11,000 | null | 468.185248 | 52.803748 | excellent | 2013-09-21 21:33:36 | 56,556.919381 | 3,635 | good | eShel | C14 | Atik460 | C14+eShel+Atik460 | high | amateur | 45.4 | -5.4 | 500 | 0 | -1.9694 | None | None | true | bintable_spectrum | validation |
[6489.0498046875,6489.10009765625,6489.14990234375,6489.2001953125,6489.25,6489.2998046875,6489.3500(...TRUNCATED) | [1.0915110111236572,1.088795781135559,1.08607816696167,1.0833580493927002,1.080694317817688,1.078400(...TRUNCATED) | [0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0(...TRUNCATED) | a5cbb9dfd2bb42d265abdbada639a787 | 14 LAC | 14 Lac | 342.590728 | 41.953394 | 6,489.049805 | 6,694.549805 | 4,110 | 11,000 | null | 495.40591 | null | excellent | 2013-09-21 21:33:36 | 56,556.919381 | 3,635 | good | eShel | C14 | Atik460 | C14+eShel+Atik460 | high | amateur | 45.4 | -5.4 | 500 | 0 | -1.9694 | None | None | true | bintable_spectrum | validation |
[6303.5,6303.5498046875,6303.60009765625,6303.64990234375,6303.7001953125,6303.75,6303.7998046875,63(...TRUNCATED) | [1.158699631690979,1.1595920324325562,1.1581902503967285,1.1559559106826782,1.1537201404571533,1.151(...TRUNCATED) | [0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0(...TRUNCATED) | b5fe6101c6276844b348e403449a1e38 | 14 LAC | 14 Lac | 342.590728 | 41.953394 | 6,303.5 | 6,500.549805 | 3,941 | 11,000 | null | 540.288018 | 81.646679 | excellent | 2013-09-21 21:33:36 | 56,556.919381 | 3,635 | good | eShel | C14 | Atik460 | C14+eShel+Atik460 | high | amateur | 45.4 | -5.4 | 500 | 0 | -1.9694 | None | None | true | bintable_spectrum | validation |
[6131.5,6131.5498046875,6131.60009765625,6131.64990234375,6131.7001953125,6131.75,6131.7998046875,61(...TRUNCATED) | [1.1822528839111328,1.1791038513183594,1.1759521961212158,1.1727979183197021,1.1708602905273438,1.17(...TRUNCATED) | [0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0(...TRUNCATED) | 0a97978196a803d2a196e82ea8818677 | 14 LAC | 14 Lac | 342.590728 | 41.953394 | 6,131.5 | 6,316.549805 | 3,701 | 11,000 | null | 513.490355 | 74.425981 | excellent | 2013-09-21 21:33:36 | 56,556.919381 | 3,635 | good | eShel | C14 | Atik460 | C14+eShel+Atik460 | high | amateur | 45.4 | -5.4 | 500 | 0 | -1.9694 | None | None | true | bintable_spectrum | validation |
[5967.5,5967.5498046875,5967.60009765625,5967.64990234375,5967.7001953125,5967.75,5967.7998046875,59(...TRUNCATED) | [1.3243857622146606,1.308941125869751,1.2980998754501343,1.2985073328018188,1.2989145517349243,1.299(...TRUNCATED) | [0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0(...TRUNCATED) | c4ba217193b627579dd62c65f851fb60 | 14 LAC | 14 Lac | 342.590728 | 41.953394 | 5,967.5 | 6,143.549805 | 3,521 | 11,000 | null | 520.293858 | 54.009869 | excellent | 2013-09-21 21:33:36 | 56,556.919381 | 3,635 | good | eShel | C14 | Atik460 | C14+eShel+Atik460 | high | amateur | 45.4 | -5.4 | 500 | 0 | -1.9694 | None | None | true | bintable_spectrum | validation |
[5813.5,5813.5498046875,5813.60009765625,5813.64990234375,5813.7001953125,5813.75,5813.7998046875,58(...TRUNCATED) | [1.3368895053863525,1.341288685798645,1.3469022512435913,1.3525173664093018,1.3581340312957764,1.352(...TRUNCATED) | [0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0(...TRUNCATED) | 316e2d251e20f836f9d124021f8b334e | 14 LAC | 14 Lac | 342.590728 | 41.953394 | 5,813.5 | 5,979.549805 | 3,321 | 11,000 | null | 445.546129 | 58.552053 | excellent | 2013-09-21 21:33:36 | 56,556.919381 | 3,635 | good | eShel | C14 | Atik460 | C14+eShel+Atik460 | high | amateur | 45.4 | -5.4 | 500 | 0 | -1.9694 | None | None | true | bintable_spectrum | validation |
End of preview. Expand in Data Studio
BESS-Bench v1.0 — inspection sample
This is a stratified sample of the full BESS-Bench v1.0 dataset
matthieulel/bess-bench,
provided so that the data can be inspected without downloading the
10 GB full release. It is the sample that was made available during the
peer review of the NeurIPS 2026 paper (file unchanged).
from datasets import load_dataset
sample = load_dataset("matthieulel/bess-bench-sample", split="train")
How the sample was built
- Source. The full release (339,115 spectra, 35 columns).
- Star-level splits. The star-level partition of the full release
(
splits.csv, 1,024 train / 219 validation / 225 test stars) is used to stratify the draw. - Sampling rule (seed 42). For each of the three splits, draw 50 stars uniformly at random; for every selected star, retain at most 20 spectra. Union over the three splits.
- Result. 1,976 spectra (0.6 % of the corpus) from 150 stars
(692 train / 685 validation / 599 test rows), with the split
membership stored in an additional
splitcolumn.
The schema, dtypes, column semantics and metadata conventions are
identical to the full release; only the rows are subsampled. No
spectrum is altered. The known issues of v1.0 documented in the card of
the full release apply to the sample as well: 4 of its rows have a
wavelength array in nm instead of Å.
Reproducing the sample
The build script is scripts/build_review_sample.py in the
code repository.
Differences with the full release
| Property | Full release | This sample |
|---|---|---|
| Repository | matthieulel/bess-bench |
matthieulel/bess-bench-sample |
| Spectra | 339,115 | 1,976 |
| Stars | 1,468 | 150 (50 per split) |
| Per-star cap | none | 20 spectra |
split column |
absent (use splits.csv) |
present |
| Schema | 35 columns | 35 + split |
Licence
CC-BY-4.0, same as the full release. See the card of the full dataset for attribution and citation guidance.
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