Pith Number

pith:WJV74FB2

pith:1999:WJV74FB2DTUEFRPT4JTOLVLLCY

not attested not anchored not stored refs pending

On the ionizing continuum in active galactic nuclei: clues from ISO

2), Brazil), Germany; (3) Instituto Astron\^omico e Geof\'isico, M. Almudena Prieto (1, Spain; (2) Max-Plank-Institut fuer extraterrestriche Physik, Sueli M. Viegas (3) ((1) Instituto de Astrof\'isica de Canarias

arxiv:astro-ph/9911265 v1 · 1999-11-15 · 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{WJV74FB2DTUEFRPT4JTOLVLLCY}

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	2026-05-18T01:09:21.331980Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b26bfe143a1ce842c5f3e266e5d56b160a88452be46a6054fa04e88096bf0083

Aliases

arxiv: astro-ph/9911265 · arxiv_version: astro-ph/9911265v1 · doi: 10.48550/arxiv.astro-ph/9911265 · pith_short_12: WJV74FB2DTUE · pith_short_16: WJV74FB2DTUEFRPT · pith_short_8: WJV74FB2

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/WJV74FB2DTUEFRPT4JTOLVLLCY \
  | 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: b26bfe143a1ce842c5f3e266e5d56b160a88452be46a6054fa04e88096bf0083

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "31bb026644228af8b5295f2414f368a7f7f452ed54ff17c0991e3bd35606e2ff",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-11-15T15:18:49Z",
    "title_canon_sha256": "b82617ee9733030a6ee5d8f8aaae232e6035c87db09fe55e38731ec819238b5a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9911265",
    "kind": "arxiv",
    "version": 1
  }
}