Pith Number

pith:SF47WLJL

pith:2021:SF47WLJLQ3JAB6XLEKOHKRXOL4

not attested not anchored not stored refs pending

The Age of Westerlund 1 Revisited

Ben Davies, Donald F. Figer, Emma R. Beasor, Nathan Smith, Robert D. Gehrz

arxiv:2103.02609 v1 · 2021-03-03 · 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{SF47WLJLQ3JAB6XLEKOHKRXOL4}

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	2026-07-05T02:41:16.678045Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9179fb2d2b86d200faeb229c7546ee5f066279da02f5ecf3693c1c3a23958d86

Aliases

arxiv: 2103.02609 · arxiv_version: 2103.02609v1 · doi: 10.48550/arxiv.2103.02609 · pith_short_12: SF47WLJLQ3JA · pith_short_16: SF47WLJLQ3JAB6XL · pith_short_8: SF47WLJL

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/SF47WLJLQ3JAB6XLEKOHKRXOL4 \
  | 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: 9179fb2d2b86d200faeb229c7546ee5f066279da02f5ecf3693c1c3a23958d86

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa06998fd1dce76801701c560343ecadaa0375ad31abbc92cd151031f4469143",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2021-03-03T19:00:01Z",
    "title_canon_sha256": "1b10951367c85d2d9071930fcf5ef9fb04a91ea6492688c18ecd9bcf3286f8ab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.02609",
    "kind": "arxiv",
    "version": 1
  }
}