Pith Number

pith:NGYB3B7Q

pith:2009:NGYB3B7QTXN63IPQC6EJVJREEQ

not attested not anchored not stored refs pending

Discovery of fog at the south pole of Titan

A.L. Smith, C. Chen, M. Adamkovics, M.E. Brown

arxiv:0908.4087 v1 · 2009-08-27 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NGYB3B7QTXN63IPQC6EJVJREEQ}

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	2026-05-18T02:12:21.934537Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69b01d87f09ddbeda1f017889aa624242f76aa264681ebc8dbf69bc140c82b6e

Aliases

arxiv: 0908.4087 · arxiv_version: 0908.4087v1 · doi: 10.48550/arxiv.0908.4087 · pith_short_12: NGYB3B7QTXN6 · pith_short_16: NGYB3B7QTXN63IPQ · pith_short_8: NGYB3B7Q

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/NGYB3B7QTXN63IPQC6EJVJREEQ \
  | 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: 69b01d87f09ddbeda1f017889aa624242f76aa264681ebc8dbf69bc140c82b6e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e6b9512c3da18632d988ab286d440563fe52916f16a080cd338cc7dfd73cdf4f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2009-08-27T20:54:12Z",
    "title_canon_sha256": "cfa31a76cda21cc00368712272f4ef9af6b93dbfa03cc260c3bc41d35804b61b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.4087",
    "kind": "arxiv",
    "version": 1
  }
}