Pith Number

pith:4JAQCCC7

pith:2009:4JAQCCC7U3TI6GLHY7T7RLHH5S

not attested not anchored not stored refs pending

H2 formation and excitation in the Stephan's Quintet galaxy-wide collision

F. Boulanger, G. Pineau des Forets, P. Guillard, P.N. Appleton

arxiv:0904.4239 v2 · 2009-04-27 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4JAQCCC7U3TI6GLHY7T7RLHH5S}

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	2026-05-18T02:13:56.952728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e24101085fa6e68f1967c7e7f8ace7ecaf170a76c402b4e10013ca62f7b3723d

Aliases

arxiv: 0904.4239 · arxiv_version: 0904.4239v2 · doi: 10.48550/arxiv.0904.4239 · pith_short_12: 4JAQCCC7U3TI · pith_short_16: 4JAQCCC7U3TI6GLH · pith_short_8: 4JAQCCC7

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/4JAQCCC7U3TI6GLHY7T7RLHH5S \
  | 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: e24101085fa6e68f1967c7e7f8ace7ecaf170a76c402b4e10013ca62f7b3723d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1564f6c2a5b6310a5e354eaec0c7033c8257d2e9c8e4086a4e56db03a53b6d90",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-27T19:24:04Z",
    "title_canon_sha256": "96c18b72e6b545cd4f844ca24186c7367f25ae3915b7f6c11cca8c9dd679b332"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4239",
    "kind": "arxiv",
    "version": 2
  }
}