Pith Number

pith:SPCWXWD3

pith:2018:SPCWXWD3OCWUQ7C6TIVFZDU2XR

not attested not anchored not stored refs pending

The double blue straggler sequence in NGC 2173: a field contamination artefact?

Chengyuan Li, Dengkai Jiang, Licai Deng, Richard de Grijs, Yu Xin

arxiv:1812.04807 v1 · 2018-12-12 · 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{SPCWXWD3OCWUQ7C6TIVFZDU2XR}

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	2026-05-17T23:58:27.309234Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93c56bd87b70ad487c5e9a2a5c8e9abc64a708a351d7a90402f5902f77797e98

Aliases

arxiv: 1812.04807 · arxiv_version: 1812.04807v1 · doi: 10.48550/arxiv.1812.04807 · pith_short_12: SPCWXWD3OCWU · pith_short_16: SPCWXWD3OCWUQ7C6 · pith_short_8: SPCWXWD3

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/SPCWXWD3OCWUQ7C6TIVFZDU2XR \
  | 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: 93c56bd87b70ad487c5e9a2a5c8e9abc64a708a351d7a90402f5902f77797e98

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f7e43b4f4e3317f7972f0f806567e1052a8f340bdef6b1a8714b71d21d5b1c2",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2018-12-12T04:43:05Z",
    "title_canon_sha256": "75f96c47e1336d9dc21d5572535b9d65cb54f29941af285a85997830b15b9b26"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.04807",
    "kind": "arxiv",
    "version": 1
  }
}