Pith Number

pith:Y3Q37WON

pith:2013:Y3Q37WONXAXYOQP2ZAIL5O5HK3

not attested not anchored not stored refs pending

Constraints on Helium Enhancement in the Globular Cluster M4 (NGC 6121): The Horizontal Branch Test

A. A. R. Valcarce, C. Cort\'es, J. Alonso-Garc\'ia, J. R. De Medeiros, M. Catelan

arxiv:1312.1513 v1 · 2013-12-05 · 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{Y3Q37WONXAXYOQP2ZAIL5O5HK3}

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	2026-05-18T01:45:58.371077Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c6e1bfd9cdb82f8741fac810bebba756f20d9a8c22c666681f372f365a66bfd8

Aliases

arxiv: 1312.1513 · arxiv_version: 1312.1513v1 · doi: 10.48550/arxiv.1312.1513 · pith_short_12: Y3Q37WONXAXY · pith_short_16: Y3Q37WONXAXYOQP2 · pith_short_8: Y3Q37WON

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/Y3Q37WONXAXYOQP2ZAIL5O5HK3 \
  | 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: c6e1bfd9cdb82f8741fac810bebba756f20d9a8c22c666681f372f365a66bfd8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5461c44316b307052946c2b6ee4c3fbab5b0a64ba44512ca31eb37051b042ca4",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-12-05T12:08:02Z",
    "title_canon_sha256": "b2ffa326a30afd6ff6dab92ce5cc37d20c0279fc1cf381f87cc43eac815f7135"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.1513",
    "kind": "arxiv",
    "version": 1
  }
}