Pith Number

pith:ZWKO2U6I

pith:2013:ZWKO2U6I4NMW7HJSSRV6M7IHPE

not attested not anchored not stored refs pending

Chemical Abundance Evidence of Enduring High Star Formation Rates in an Early Type Galaxy: High [Ca/Fe] in NGC 5128 Globular Clusters

A. McWilliam, J. E. Colucci, M. F. Duran, R. A. Bernstein

arxiv:1307.0505 v1 · 2013-07-01 · astro-ph.GA · astro-ph.CO · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZWKO2U6I4NMW7HJSSRV6M7IHPE}

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	2026-05-18T01:49:01.001975Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cd94ed53c8e3596f9d32946be67d07790af3053474c170bf738ba1f4b0fcdfe7

Aliases

arxiv: 1307.0505 · arxiv_version: 1307.0505v1 · doi: 10.48550/arxiv.1307.0505 · pith_short_12: ZWKO2U6I4NMW · pith_short_16: ZWKO2U6I4NMW7HJS · pith_short_8: ZWKO2U6I

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/ZWKO2U6I4NMW7HJSSRV6M7IHPE \
  | 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: cd94ed53c8e3596f9d32946be67d07790af3053474c170bf738ba1f4b0fcdfe7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b11b01453a82839c97d097e0bf4d28a6f808598b36f54a35e108433e72d715e4",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-07-01T20:00:02Z",
    "title_canon_sha256": "55824d02b48ecacccfc12f50eab7c1f13c639d8265e83125313be85a22f0c7c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.0505",
    "kind": "arxiv",
    "version": 1
  }
}