Pith Number

pith:XD4UKFH2

pith:2012:XD4UKFH2BUBTII4GZZQZM2E5WN

not attested not anchored not stored refs pending

Variable stars in the Globular Cluster NGC 2808

Alistair R. Walker, Andrea Kunder, Marcio Catelan, Peter B. Stetson, Pia Amigo

arxiv:1211.5147 v1 · 2012-11-21 · 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{XD4UKFH2BUBTII4GZZQZM2E5WN}

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	2026-05-18T01:53:01.771266Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8f94514fa0d03342386ce6196689db3625f192efa4741b64af27afbed4adb16

Aliases

arxiv: 1211.5147 · arxiv_version: 1211.5147v1 · doi: 10.48550/arxiv.1211.5147 · pith_short_12: XD4UKFH2BUBT · pith_short_16: XD4UKFH2BUBTII4G · pith_short_8: XD4UKFH2

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/XD4UKFH2BUBTII4GZZQZM2E5WN \
  | 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: b8f94514fa0d03342386ce6196689db3625f192efa4741b64af27afbed4adb16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "159fc1cabd8b94c1a9ee227561671b35306b07852f001aca0d314ac18c212fad",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2012-11-21T21:02:21Z",
    "title_canon_sha256": "448a642f5ed2781b95a57795db1838814142d3aa7dd9a5a56395750da95f4ff4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.5147",
    "kind": "arxiv",
    "version": 1
  }
}