Pith Number

pith:W2VPYSCG

pith:2018:W2VPYSCGVNWCZUV223KFAOCRWP

not attested not anchored not stored refs pending

The R-Process Alliance: A Comprehensive Abundance Analysis of HD 222925, a Metal-Poor Star with an Extreme R-Process Enhancement of [Eu/H] = -0.14

Anna Frebel (MIT, Charli M. Sakari (U. Washington), Ian U. Roederer (U. Michigan, JINA-CEE), Rana Ezzeddine (MIT, Terese T. Hansen (Carnegie Observatories), Timothy C. Beers (U. Notre Dame, Vinicius M. Placco (U. Notre Dame

arxiv:1808.09469 v1 · 2018-08-28 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W2VPYSCGVNWCZUV223KFAOCRWP}

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	2026-05-18T00:03:15.165617Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b6aafc4846ab6c2cd2bad6d4503851b3dd052f0b572ec89454337223ac579f87

Aliases

arxiv: 1808.09469 · arxiv_version: 1808.09469v1 · doi: 10.48550/arxiv.1808.09469 · pith_short_12: W2VPYSCGVNWC · pith_short_16: W2VPYSCGVNWCZUV2 · pith_short_8: W2VPYSCG

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/W2VPYSCGVNWCZUV223KFAOCRWP \
  | 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: b6aafc4846ab6c2cd2bad6d4503851b3dd052f0b572ec89454337223ac579f87

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18988c68aad8b9b87b18381ab62cd55886d8e3848b024ae44e1ee3e6acb1bfd3",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-08-28T18:03:36Z",
    "title_canon_sha256": "e465bbe3f57e2fbf8f95e73905cd6c6bac661d735b23f7faee44de8c8b615f11"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.09469",
    "kind": "arxiv",
    "version": 1
  }
}