Pith Number

pith:UIUGR6CV

pith:2009:UIUGR6CV6XFKSGKKU6MAYKWQXL

not attested not anchored not stored refs pending

The Supermassive Black Hole and Dark Matter Halo of NGC 4649 (M60)

Juntai Shen, Karl Gebhardt

arxiv:0910.4168 v2 · 2009-10-21 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UIUGR6CV6XFKSGKKU6MAYKWQXL}

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	2026-05-18T02:34:13.194895Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a22868f855f5caa9194aa7980c2ad0badab010211203a903b23d24016dbc24b9

Aliases

arxiv: 0910.4168 · arxiv_version: 0910.4168v2 · doi: 10.48550/arxiv.0910.4168 · pith_short_12: UIUGR6CV6XFK · pith_short_16: UIUGR6CV6XFKSGKK · pith_short_8: UIUGR6CV

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/UIUGR6CV6XFKSGKKU6MAYKWQXL \
  | 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: a22868f855f5caa9194aa7980c2ad0badab010211203a903b23d24016dbc24b9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91751d942b5c1e61c9d11050a1837e413634e3c9244bb4d08a60d89e979bd809",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-21T20:26:26Z",
    "title_canon_sha256": "7cd3be7531b19f2d51d94327ecc259f4cbb398fd771f9296eb88a6629dc0e460"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.4168",
    "kind": "arxiv",
    "version": 2
  }
}