Pith Number

pith:EALJAAJJ

pith:2011:EALJAAJJ4IHZVZCPWTKBLECT3P

not attested not anchored not stored refs pending

Quantitative Evidence for an Intrinsic Age Spread in the Orion Nebula Cluster

D. R. Soderblom, L. Ricci, M. Reggiani, M. R. Meyer, M. Robberto, N. Da Rio

arxiv:1108.1015 v1 · 2011-08-04 · 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{EALJAAJJ4IHZVZCPWTKBLECT3P}

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	2026-05-18T02:01:03.069680Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2016900129e20f9ae44fb4d4159053dbd332cb8c1468b28139d2733b3333a6a4

Aliases

arxiv: 1108.1015 · arxiv_version: 1108.1015v1 · doi: 10.48550/arxiv.1108.1015 · pith_short_12: EALJAAJJ4IHZ · pith_short_16: EALJAAJJ4IHZVZCP · pith_short_8: EALJAAJJ

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/EALJAAJJ4IHZVZCPWTKBLECT3P \
  | 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: 2016900129e20f9ae44fb4d4159053dbd332cb8c1468b28139d2733b3333a6a4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b3c56db958a0c2120c0762d3e1623fe2ea02440d9911485e27289908f46f6705",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-08-04T07:55:19Z",
    "title_canon_sha256": "0b4922cba71fcf4e43b17f3c65e4e110ddabaf27128a4263db1e5ba817555f19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.1015",
    "kind": "arxiv",
    "version": 1
  }
}