Pith Number

pith:C7YWC2SE

pith:2005:C7YWC2SEHYVN25INYVZAYLJVQG

not attested not anchored not stored refs pending

The Low End of the Supermassive Black Hole Mass Function: Constraining the Mass of a Nuclear Black Hole in NGC 205 via Stellar Kinematics

Charles L. Joseph (Rutgers), David Merritt (RIT), HIA), Laura Ferrarese (Rutgers, Monica Valluri (KICP, UChicago)

arxiv:astro-ph/0502493 v2 · 2005-02-23 · 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{C7YWC2SEHYVN25INYVZAYLJVQG}

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	2026-05-18T04:22:20.864257Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

17f1616a443e2add750dc5720c2d3581b49ba9dadc86588723f530cc83a6cca7

Aliases

arxiv: astro-ph/0502493 · arxiv_version: astro-ph/0502493v2 · doi: 10.48550/arxiv.astro-ph/0502493 · pith_short_12: C7YWC2SEHYVN · pith_short_16: C7YWC2SEHYVN25IN · pith_short_8: C7YWC2SE

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/C7YWC2SEHYVN25INYVZAYLJVQG \
  | 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: 17f1616a443e2add750dc5720c2d3581b49ba9dadc86588723f530cc83a6cca7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f6698d4eab8f7a59b5cb9184a4e24d38fcd3f47a6e66311211d5524bf81f47b3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-02-23T20:15:38Z",
    "title_canon_sha256": "b41178035e138330239c900654da75c964352f3074d752c75cab09ff238f2725"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0502493",
    "kind": "arxiv",
    "version": 2
  }
}