Pith Number

pith:PGGNFCYR

pith:2005:PGGNFCYR5GTBQUTTQOPQCTV24S

not attested not anchored not stored refs pending

Precession of the Super-Massive Black Hole in NGC 1275 (3C 84)?

A.C.Fabian & J.S.Sanders (Institute of Astronomy, Cambridge), R.J.H.Dunn

arxiv:astro-ph/0512022 v1 · 2005-12-01 · 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{PGGNFCYR5GTBQUTTQOPQCTV24S}

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	2026-07-04T15:49:50.426735Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

798cd28b11e9a6185273839f014ebae481c1ab9d4d5cfbe494c3440ec422423f

Aliases

arxiv: astro-ph/0512022 · arxiv_version: astro-ph/0512022v1 · doi: 10.48550/arxiv.astro-ph/0512022 · pith_short_12: PGGNFCYR5GTB · pith_short_16: PGGNFCYR5GTBQUTT · pith_short_8: PGGNFCYR

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/PGGNFCYR5GTBQUTTQOPQCTV24S \
  | 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: 798cd28b11e9a6185273839f014ebae481c1ab9d4d5cfbe494c3440ec422423f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "778acff231483df3f0610198ad52255642fd98cb8ba27cac0cd60f0640e2433d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-12-01T12:27:47Z",
    "title_canon_sha256": "d31eb8f01d032b17c41a4f346c5581116b600c7ab7165c27beca1b2ea3db5fc0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0512022",
    "kind": "arxiv",
    "version": 1
  }
}