Pith Number

pith:ROVQ3LHD

pith:1999:ROVQ3LHDRRE6XJIBK4WKGTLTCZ

not attested not anchored not stored refs pending

BeppoSAX uncovers the hidden Seyfert 1 nucleus in the Seyfert 2 galaxy NGC 2110

A.C.Fabian, A.Comastri, D. DalFiume, F.Frontera, G.DiCocco, G.G.C.Palumbo, G.Malaguti, L.Bassani, M.Cappi, M.Dadina, M.Trifoglio, P.Blanco, R.Maiolino, T.Maccacaro

arxiv:astro-ph/9901142 v1 · 1999-01-12 · 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{ROVQ3LHDRRE6XJIBK4WKGTLTCZ}

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	2026-07-04T14:16:29.463836Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8bab0dace38c49eba501572ca34d73165961c91c5a506c1189f7255de18d6d3e

Aliases

arxiv: astro-ph/9901142 · arxiv_version: astro-ph/9901142v1 · doi: 10.48550/arxiv.astro-ph/9901142 · pith_short_12: ROVQ3LHDRRE6 · pith_short_16: ROVQ3LHDRRE6XJIB · pith_short_8: ROVQ3LHD

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/ROVQ3LHDRRE6XJIBK4WKGTLTCZ \
  | 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: 8bab0dace38c49eba501572ca34d73165961c91c5a506c1189f7255de18d6d3e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b807846a38d111d81f4cba7a6df66d7d21e0bce5984a67b00eda35a315bc2e7",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-01-12T11:42:41Z",
    "title_canon_sha256": "4ff33293aa8f5ed441141d1f6e3facd3eebdcf0e4ffe2dccfea0936416fde18b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9901142",
    "kind": "arxiv",
    "version": 1
  }
}