Pith Number

pith:F2PYG7NI

pith:2013:F2PYG7NII4QFLYPJ3HCDOUOALJ

not attested not anchored not stored refs pending

The extremely low metallicity star SDSS J102915+172927: a subgiant scenario

J. MacDonald, N. Anilmis, N.F. Rufo, T.M. Lawlor

arxiv:1302.2957 v1 · 2013-02-12 · 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{F2PYG7NII4QFLYPJ3HCDOUOALJ}

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	2026-05-18T01:51:41.902901Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2e9f837da8472055e1e9d9c43751c05a434c2fa44bb76782fde986ed7262a270

Aliases

arxiv: 1302.2957 · arxiv_version: 1302.2957v1 · doi: 10.48550/arxiv.1302.2957 · pith_short_12: F2PYG7NII4QF · pith_short_16: F2PYG7NII4QFLYPJ · pith_short_8: F2PYG7NI

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/F2PYG7NII4QFLYPJ3HCDOUOALJ \
  | 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: 2e9f837da8472055e1e9d9c43751c05a434c2fa44bb76782fde986ed7262a270

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "83921aaa0d270130c7ea0fbedaf0c4b984bf7299c7495538bf715e5ddbfe39ec",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-02-12T23:49:12Z",
    "title_canon_sha256": "82e6e2afda1ee82179cfa3df6111d25ace21ded16d531010d174a04ba84ad76b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.2957",
    "kind": "arxiv",
    "version": 1
  }
}