Pith Number

pith:P3FPWSJD

pith:2010:P3FPWSJDMQ6X5CEWRQAY6XBEV5

not attested not anchored not stored refs pending

How old are the stars in the halo of NGC 5128 (Centaurus A)?

(2) McMaster University, (3) Padova Observatory, Canada, Canada), Germany, G. L. H. Harris (4) ((1) ESO, Italy, L. Greggio (3), M. Rejkuba (1), Waterloo University, W. E. Harris (2)

arxiv:1011.4309 v1 · 2010-11-18 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P3FPWSJDMQ6X5CEWRQAY6XBEV5}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:04:43.736238Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7ecafb4923643d7e88968c018f5c24af59437985758baf7349def0aa25a736a1

Aliases

arxiv: 1011.4309 · arxiv_version: 1011.4309v1 · doi: 10.48550/arxiv.1011.4309 · pith_short_12: P3FPWSJDMQ6X · pith_short_16: P3FPWSJDMQ6X5CEW · pith_short_8: P3FPWSJD

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/P3FPWSJDMQ6X5CEWRQAY6XBEV5 \
  | 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: 7ecafb4923643d7e88968c018f5c24af59437985758baf7349def0aa25a736a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "21102c52b8abc812acd5ac11bc8d0573841c925da67464edad53e1b388c7e2d3",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-11-18T21:23:46Z",
    "title_canon_sha256": "b7e875f5a7f743c6037675d6ef6b846422b275d23cba027f9d4a6bf732867470"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.4309",
    "kind": "arxiv",
    "version": 1
  }
}