Pith Number

pith:T4Z47JLY

pith:2009:T4Z47JLY57BTHXKQXK42M24J4A

not attested not anchored not stored refs pending

The Astronomy of Aboriginal Australia

Duane W. Hamacher, Ray P. Norris

arxiv:0906.0155 v1 · 2009-05-31 · physics.hist-ph · physics.soc-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T4Z47JLY57BTHXKQXK42M24J4A}

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	2026-05-18T02:13:30.273623Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f33cfa578efc333dd50bab9a66b89e031db480898d445d70aba5b0521399fed

Aliases

arxiv: 0906.0155 · arxiv_version: 0906.0155v1 · doi: 10.48550/arxiv.0906.0155 · pith_short_12: T4Z47JLY57BT · pith_short_16: T4Z47JLY57BTHXKQ · pith_short_8: T4Z47JLY

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/T4Z47JLY57BTHXKQXK42M24J4A \
  | 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: 9f33cfa578efc333dd50bab9a66b89e031db480898d445d70aba5b0521399fed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5dd73a92896a9d54e6d85d73e3737197eea4ae4dae616eb80967146edded642e",
    "cross_cats_sorted": [
      "physics.soc-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2009-05-31T13:31:09Z",
    "title_canon_sha256": "eb9cdb4e600f4b29b867e94499e6fd4f6c1662a00722edb1a477c47b6310aeac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.0155",
    "kind": "arxiv",
    "version": 1
  }
}