Pith Number

pith:LY4EAK4Y

pith:2012:LY4EAK4YNLPZ2YERRTJHPBLBDO

not attested not anchored not stored refs pending

A Chandra Survey of Supermassive Black Holes with Dynamical Mass Measurements

Douglas O. Richstone, Edward M. Cackett, Jon M. Miller, Kayhan Gultekin, Sera Markoff, Tiziana Di Matteo

arxiv:1202.3147 v1 · 2012-02-14 · astro-ph.HE · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LY4EAK4YNLPZ2YERRTJHPBLBDO}

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	2026-05-18T01:58:28.428098Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5e38402b986adf9d60918cd27785611b822fe3269782dd90567abb53ec7c7ecf

Aliases

arxiv: 1202.3147 · arxiv_version: 1202.3147v1 · doi: 10.48550/arxiv.1202.3147 · pith_short_12: LY4EAK4YNLPZ · pith_short_16: LY4EAK4YNLPZ2YER · pith_short_8: LY4EAK4Y

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/LY4EAK4YNLPZ2YERRTJHPBLBDO \
  | 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: 5e38402b986adf9d60918cd27785611b822fe3269782dd90567abb53ec7c7ecf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1004e452b61e5ae87e8506e4798b7c28e407c213ed94afa197c408ad4e320692",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-02-14T21:03:52Z",
    "title_canon_sha256": "93dfaea242b8ac192b577c5704b8ad4fec507dce481d84dbfc85e07982531f9f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.3147",
    "kind": "arxiv",
    "version": 1
  }
}