Pith Number

pith:Q2SOU4BE

pith:2009:Q2SOU4BED3AZU2YRW45QCCZDWA

not attested not anchored not stored refs pending

The Disk Population of the Taurus Star-Forming Region

C. Espaillat, K. L. Luhman, L. Hartmann, N. Calvet, P. R. Allen

arxiv:0911.5457 v2 · 2009-11-29 · 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{Q2SOU4BED3AZU2YRW45QCCZDWA}

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	2026-05-18T02:24:46.052273Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86a4ea70241ec19a6b11b73b010b23b01b621d8800faba5d6b425f8c1526ddb0

Aliases

arxiv: 0911.5457 · arxiv_version: 0911.5457v2 · doi: 10.48550/arxiv.0911.5457 · pith_short_12: Q2SOU4BED3AZ · pith_short_16: Q2SOU4BED3AZU2YR · pith_short_8: Q2SOU4BE

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/Q2SOU4BED3AZU2YRW45QCCZDWA \
  | 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: 86a4ea70241ec19a6b11b73b010b23b01b621d8800faba5d6b425f8c1526ddb0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f408269ac13cde5d1bd35e78d8b730673c774382bf9d3362012c64ce665ba54",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-11-29T01:57:20Z",
    "title_canon_sha256": "68d61471f1c98692cf960338e90eb1095065b5661dd41d1e325e844405f533f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.5457",
    "kind": "arxiv",
    "version": 2
  }
}