Pith Number

pith:3TD2UGUS

pith:2003:3TD2UGUS4M3BOKIKK7WBBVO767

not attested not anchored not stored refs pending

The Age-Metallicity Relation of the Universe in Neutral Gas: The First 100 Damped Lya Systems

(2) UC San Diego, 3), (3) Yale University, (4) Caltech, 5), (5) IPAC), Arthur M. Wolfe (2), Eric Gawiser (2, Jason X. Prochaska (1), Sandro Castro (4, & S. G. Djorgovski (4) ((1) UCO/Lick Observatory

arxiv:astro-ph/0305314 v1 · 2003-05-16 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3TD2UGUS4M3BOKIKK7WBBVO767}

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

Cosmic evolution of the helium and oxygen abundances in type 2 Active Galactic Nuclei: Helium-loud AGNs

Receipt and verification

First computed	2026-07-04T16:37:09.412072Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dcc7aa1a92e33617290a57ec10d5dff7ed987f376cc64de399d7ecceaa0987dc

Aliases

arxiv: astro-ph/0305314 · arxiv_version: astro-ph/0305314v1 · doi: 10.48550/arxiv.astro-ph/0305314 · pith_short_12: 3TD2UGUS4M3B · pith_short_16: 3TD2UGUS4M3BOKIK · pith_short_8: 3TD2UGUS

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/3TD2UGUS4M3BOKIKK7WBBVO767 \
  | 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: dcc7aa1a92e33617290a57ec10d5dff7ed987f376cc64de399d7ecceaa0987dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd8a1ec2e2e1bada3dc2cf0405ba81f185e00c987051c3ee8df9c63fb396266f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-05-16T23:08:27Z",
    "title_canon_sha256": "20509a7261702d63dc021c495aa147c6c64623ef19fa35bb93b6726da5869b24"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0305314",
    "kind": "arxiv",
    "version": 1
  }
}