Pith Number

pith:3R7AUEUG

pith:2012:3R7AUEUGUVO32D2KBIXMCEQIUU

not attested not anchored not stored refs pending

Masses of Nearby Supermassive Black Holes with Very-Long Baseline Interferometry

Daniel P. Marrone, Dimitrios Psaltis (Arizona), Feryal Ozel (Arizona), Sheperd S. Doeleman, Stefan Gillessen (MPE), Tim Johannsen, Vincent L. Fish (MIT Haystack)

arxiv:1201.0758 v2 · 2012-01-03 · astro-ph.GA · astro-ph.CO · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3R7AUEUGUVO32D2KBIXMCEQIUU}

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	2026-05-18T01:58:58.260799Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dc7e0a1286a55dbd0f4a0a2ec11208a5271b537bc5922dcd45aad417fd42f76a

Aliases

arxiv: 1201.0758 · arxiv_version: 1201.0758v2 · doi: 10.48550/arxiv.1201.0758 · pith_short_12: 3R7AUEUGUVO3 · pith_short_16: 3R7AUEUGUVO32D2K · pith_short_8: 3R7AUEUG

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/3R7AUEUGUVO32D2KBIXMCEQIUU \
  | 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: dc7e0a1286a55dbd0f4a0a2ec11208a5271b537bc5922dcd45aad417fd42f76a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "08fba0fc0b31ac12c85a054b7e7a9d3786e0ba12221eabab55a611d0020b8357",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2012-01-03T21:00:05Z",
    "title_canon_sha256": "166f493d035e90ee6388ab3f73d4716384bad535922bb76691a6bd42a593d000"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.0758",
    "kind": "arxiv",
    "version": 2
  }
}