Pith Number

pith:AIGZ2VN3

pith:2013:AIGZ2VN3MZHMM7LDMNHPXFOLJA

not attested not anchored not stored refs pending

X-Shooter GTO: evidence for a population of extremely metal-poor, alpha-poor stars

B. Plez, E. Caffau, F. Hammer, F. Spite, H.-G. Ludwig, L. Monaco, L. Sbordone, M. Spite, P. Bonifacio, P. Francois, P. Molaro, R. Cayrel, S. Randich, S. Zaggia, V. Hill

arxiv:1309.4913 v1 · 2013-09-19 · astro-ph.GA · 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{AIGZ2VN3MZHMM7LDMNHPXFOLJA}

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	2026-05-18T01:47:35.535011Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

020d9d55bb664ec67d63634efb95cb483adf0d89103d753e38ca9b4c22a6c50d

Aliases

arxiv: 1309.4913 · arxiv_version: 1309.4913v1 · doi: 10.48550/arxiv.1309.4913 · pith_short_12: AIGZ2VN3MZHM · pith_short_16: AIGZ2VN3MZHMM7LD · pith_short_8: AIGZ2VN3

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/AIGZ2VN3MZHMM7LDMNHPXFOLJA \
  | 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: 020d9d55bb664ec67d63634efb95cb483adf0d89103d753e38ca9b4c22a6c50d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63d40f15955bb32ad994ad0271719128a7131b7d74305df91ad184082de5bc7b",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-09-19T09:47:20Z",
    "title_canon_sha256": "7d2615cfba60d28c1b6136315b175ef7ec448e9311a8d9683cac2bd2ad530221"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.4913",
    "kind": "arxiv",
    "version": 1
  }
}