Pith Number

pith:AUBBQEQI

pith:2011:AUBBQEQICLNAOKWK4UC4MQWKRO

not attested not anchored not stored refs pending

A Principal Component Analysis of quasar UV spectra at z~3

Ch. Pichon, Ch. Y\`eche, E. Aubourg, E. Rollinde, I. P\^aris, J.-Ch. Hamilton, J.-M. Le Goff, J. Rich, M. Vargas-Maga\~na, N. Busca, N. Palanque-Delabrouille, P. Petitjean, R. Charlassier, S. Peirani, T. Delubac

arxiv:1104.2024 v1 · 2011-04-11 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AUBBQEQICLNAOKWK4UC4MQWKRO}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

1 paper in Pith

Machine Learning Techniques for Astrophysics and Cosmology: Lyman-$\alpha$ forest

Receipt and verification

First computed	2026-05-18T02:22:09.946148Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

050218120812da072acae505c642ca8baa10c116b0fcd964ad4d8a6a0710f0f5

Aliases

arxiv: 1104.2024 · arxiv_version: 1104.2024v1 · doi: 10.48550/arxiv.1104.2024 · pith_short_12: AUBBQEQICLNA · pith_short_16: AUBBQEQICLNAOKWK · pith_short_8: AUBBQEQI

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/AUBBQEQICLNAOKWK4UC4MQWKRO \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 050218120812da072acae505c642ca8baa10c116b0fcd964ad4d8a6a0710f0f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f27da3ffa61a2c51889e7543131028cab5f369ded219390b1c43b9f1dacfd118",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-04-11T18:57:53Z",
    "title_canon_sha256": "aa5352aa3b43aea40547c96e2033a975112aaf400442e5f000bc84a8de8ada06"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.2024",
    "kind": "arxiv",
    "version": 1
  }
}