Pith Number

pith:OG4PKITB

pith:2012:OG4PKITBHVUMMW5IL5UNO7KVK2

not attested not anchored not stored refs pending

Identifying Blue Horizontal Branch Stars Using the z Filter

Avon P. Huxor, Eva K. Grebel, John J. Vickers

arxiv:1201.4571 v1 · 2012-01-22 · 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{OG4PKITBHVUMMW5IL5UNO7KVK2}

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	2026-05-18T01:58:43.828765Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

71b8f522613d68c65ba85f68d77d5556a34daa2567472f81688579b1aa1eeed5

Aliases

arxiv: 1201.4571 · arxiv_version: 1201.4571v1 · doi: 10.48550/arxiv.1201.4571 · pith_short_12: OG4PKITBHVUM · pith_short_16: OG4PKITBHVUMMW5I · pith_short_8: OG4PKITB

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/OG4PKITBHVUMMW5IL5UNO7KVK2 \
  | 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: 71b8f522613d68c65ba85f68d77d5556a34daa2567472f81688579b1aa1eeed5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2c14e266e57c013a163b14e76ddb81dd4effcb54fe3c5d6bc1b8d01149e67dc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2012-01-22T16:56:03Z",
    "title_canon_sha256": "86b333fa2aca3bced5030b5847ee05d6f67415d01f070c9a80f4b81a36cbd9f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.4571",
    "kind": "arxiv",
    "version": 1
  }
}