Pith Number

pith:EY6MUTN4

pith:2011:EY6MUTN4YWHCVK5VYQIYB63UYG

not attested not anchored not stored refs pending

The estimation of black-hole masses in distant radio galaxies

M.L. Khabibullina, O.V. Verkhodanov

arxiv:1108.4506 v1 · 2011-08-23 · 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{EY6MUTN4YWHCVK5VYQIYB63UYG}

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	2026-05-18T04:14:54.383830Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

263cca4dbcc58e2aabb5c41180fb74c18162a656c543d3d8e932f03ea0fb56cb

Aliases

arxiv: 1108.4506 · arxiv_version: 1108.4506v1 · doi: 10.48550/arxiv.1108.4506 · pith_short_12: EY6MUTN4YWHC · pith_short_16: EY6MUTN4YWHCVK5V · pith_short_8: EY6MUTN4

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/EY6MUTN4YWHCVK5VYQIYB63UYG \
  | 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: 263cca4dbcc58e2aabb5c41180fb74c18162a656c543d3d8e932f03ea0fb56cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2446cb509628f16b6ec792b9775aad28c462b80a608ccd27c03fc65c4786e73f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-08-23T07:07:56Z",
    "title_canon_sha256": "e69c533d14157c914a7cf87d501ffcc4d5a80c2a54430dc6cd02e00e55e21aab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.4506",
    "kind": "arxiv",
    "version": 1
  }
}