Pith Number

pith:B3FSJMII

pith:2018:B3FSJMIILVIRBUI4CARXNAEUSF

not attested not anchored not stored refs pending

Berkeley 51, a young open cluster with four yellow supergiants

Amparo Marco, Carlos Gonz\'alez-Fern\'andez (Cambridge), Hugo M. Tabernero (Alicante), Ignacio Negueruela (Alicante), Maria Mongui\'o (Hertfordshire), Ricardo Dorda (Alicante)

arxiv:1803.07477 v2 · 2018-03-20 · astro-ph.SR · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B3FSJMIILVIRBUI4CARXNAEUSF}

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	2026-05-18T00:20:29.577235Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ecb24b1085d5110d11c10237680949149d79dc6ae7a95b899f537c0c991b16a

Aliases

arxiv: 1803.07477 · arxiv_version: 1803.07477v2 · doi: 10.48550/arxiv.1803.07477 · pith_short_12: B3FSJMIILVIR · pith_short_16: B3FSJMIILVIRBUI4 · pith_short_8: B3FSJMII

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/B3FSJMIILVIRBUI4CARXNAEUSF \
  | 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: 0ecb24b1085d5110d11c10237680949149d79dc6ae7a95b899f537c0c991b16a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "879bc22725d850c5a1483f44a57c923cd2600b6400ccb41b70ba71d500502877",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-03-20T15:12:35Z",
    "title_canon_sha256": "60284cc0644957df08a658c105becd88c5bfd4adddb1ad82d9cd3d5f54d763d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.07477",
    "kind": "arxiv",
    "version": 2
  }
}