Pith Number

pith:B54IHNIK

pith:2010:B54IHNIKFUOCMHULVISTRDOE3T

not attested not anchored not stored refs pending

The peculiar optical spectrum of 4C+22.25: Imprint of a massive black hole binary?

Alessandro Ederoclite, Carmen Montuori, Massimo Dotti, Roberto Decarli, Tiina Liimets

arxiv:1007.3738 v1 · 2010-07-21 · 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{B54IHNIKFUOCMHULVISTRDOE3T}

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	2026-05-18T02:06:11.867595Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f7883b50a2d1c261e8baa25388dc4dcc233d4dec637221245680000b519380e

Aliases

arxiv: 1007.3738 · arxiv_version: 1007.3738v1 · doi: 10.48550/arxiv.1007.3738 · pith_short_12: B54IHNIKFUOC · pith_short_16: B54IHNIKFUOCMHUL · pith_short_8: B54IHNIK

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/B54IHNIKFUOCMHULVISTRDOE3T \
  | 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: 0f7883b50a2d1c261e8baa25388dc4dcc233d4dec637221245680000b519380e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e8ce841ea6013e3f1f6eef00ac954afbd1765102a7e1664cc623ba6ccfa7a447",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-07-21T20:00:04Z",
    "title_canon_sha256": "395c5cac0a39643222e5bfd13de914cd38f56beaeb424ca21a84ea7e2efcd8e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1007.3738",
    "kind": "arxiv",
    "version": 1
  }
}