Pith Number

pith:WOPVJNW2

pith:2004:WOPVJNW2V7ZHGRFIRRADIDFD2I

not attested not anchored not stored refs pending

Free-Free Emission at Low Radio Frequencies

Asantha Cooray, Steven Furlanetto (Caltech)

arxiv:astro-ph/0402239 v1 · 2004-02-10 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WOPVJNW2V7ZHGRFIRRADIDFD2I}

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	2026-07-04T16:43:00.638470Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b39f54b6daaff27344a88c40340ca3d20d8609b1b101264b7dc3813f87cf1c32

Aliases

arxiv: astro-ph/0402239 · arxiv_version: astro-ph/0402239v1 · doi: 10.48550/arxiv.astro-ph/0402239 · pith_short_12: WOPVJNW2V7ZH · pith_short_16: WOPVJNW2V7ZHGRFI · pith_short_8: WOPVJNW2

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/WOPVJNW2V7ZHGRFIRRADIDFD2I \
  | 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: b39f54b6daaff27344a88c40340ca3d20d8609b1b101264b7dc3813f87cf1c32

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1ce063a0490d1764ee21f62f3cf76c6d04175b5e075260702616520f771b07d7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-02-10T21:06:05Z",
    "title_canon_sha256": "07354b5acb549254cdcb7a56683cadb1aa74c0a19bbfd84c0c41014fb26d785b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0402239",
    "kind": "arxiv",
    "version": 1
  }
}