Pith Number

pith:OCYGOJDG

pith:1997:OCYGOJDG6IRI4YQN75E5BVQG2K

not attested not anchored not stored refs pending

The Metallicity of High Redshift Galaxies: The Abundance of Zinc in 34 Damped Lyman Alpha Systems from z = 0.7 to 3.4

David L. King (Royal Greenwich Observatory), Linda J. Smith (University College London), Max Pettini (Royal Greenwich Observatory), Richard W. Hunstead (University of Sydney)

arxiv:astro-ph/9704102 v1 · 1997-04-11 · 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{OCYGOJDG6IRI4YQN75E5BVQG2K}

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.

Receipt and verification

First computed	2026-05-18T01:40:17.805789Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

70b0672466f2228e620dff49d0d606d2a6c13509c101d3e4d1edbc38da3be4fe

Aliases

arxiv: astro-ph/9704102 · arxiv_version: astro-ph/9704102v1 · doi: 10.48550/arxiv.astro-ph/9704102 · pith_short_12: OCYGOJDG6IRI · pith_short_16: OCYGOJDG6IRI4YQN · pith_short_8: OCYGOJDG

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/OCYGOJDG6IRI4YQN75E5BVQG2K \
  | 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: 70b0672466f2228e620dff49d0d606d2a6c13509c101d3e4d1edbc38da3be4fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ba115d13680cf2a1df6c963d1938b789986dd41d4f56c7c1c9cc963f4be2f5a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-04-11T17:12:25Z",
    "title_canon_sha256": "1fab6d96d89d50a553de13640cc40a14b2e3d420da99bd9b3e43dc82397b7f52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9704102",
    "kind": "arxiv",
    "version": 1
  }
}