Pith Number

pith:5GCU7P2P

pith:2000:5GCU7P2PH2UM64GPMLZB2MYS2C

not attested not anchored not stored refs pending

Evidence for a Supermassive Black Hole in the S0 Galaxy NGC 3245

A.J. Barth, A.V. Filippenko, H.-W. Rix, L.C. Ho, M. Sarzi, W.L.W. Sargent

arxiv:astro-ph/0012213 v2 · 2000-12-11 · 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{5GCU7P2PH2UM64GPMLZB2MYS2C}

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.

Cited by

1 paper in Pith

A Jet from a Nearly Dormant Black Hole

Receipt and verification

First computed	2026-07-04T16:17:46.582197Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9854fbf4f3ea8cf70cf62f21d3312d080b6b9c89f758964b56583a4a7285d4f

Aliases

arxiv: astro-ph/0012213 · arxiv_version: astro-ph/0012213v2 · doi: 10.48550/arxiv.astro-ph/0012213 · pith_short_12: 5GCU7P2PH2UM · pith_short_16: 5GCU7P2PH2UM64GP · pith_short_8: 5GCU7P2P

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/5GCU7P2PH2UM64GPMLZB2MYS2C \
  | 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: e9854fbf4f3ea8cf70cf62f21d3312d080b6b9c89f758964b56583a4a7285d4f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0f8cbf240fb527821079b50e2a0262159e25bb3646c7ac2c97ffe7f37c2e582",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-12-11T00:33:37Z",
    "title_canon_sha256": "c9d492cdd189621ce91b27299c3e610d605fbb75079d096b6df4d506ef5d6ce9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0012213",
    "kind": "arxiv",
    "version": 2
  }
}