Pith Number

pith:3AQTJAWL

pith:2017:3AQTJAWLZWDYIOFKKKUHTZT5DU

not attested not anchored not stored refs pending

Repeated Imaging of Massive Black Hole Binary Orbits with Millimeter Interferometry: measuring black hole masses and the Hubble constant

Abraham Loeb, Daniel J. D'Orazio

arxiv:1712.02362 v2 · 2017-12-06 · astro-ph.HE · 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{3AQTJAWLZWDYIOFKKKUHTZT5DU}

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	2026-05-18T00:06:41.028350Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d8213482cbcd878438aa52a879e67d1d0dc20a2e01cba56370336c8e342c30da

Aliases

arxiv: 1712.02362 · arxiv_version: 1712.02362v2 · doi: 10.48550/arxiv.1712.02362 · pith_short_12: 3AQTJAWLZWDY · pith_short_16: 3AQTJAWLZWDYIOFK · pith_short_8: 3AQTJAWL

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/3AQTJAWLZWDYIOFKKKUHTZT5DU \
  | 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: d8213482cbcd878438aa52a879e67d1d0dc20a2e01cba56370336c8e342c30da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f4fcecc5319f912b9f34253cda7c752bfd2b1deb978b8bd638067f7a96b3360f",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2017-12-06T19:00:05Z",
    "title_canon_sha256": "c9ad232d34320b69415bba022f29d97b630d842d9dd96a5391c528f5c7e7981b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.02362",
    "kind": "arxiv",
    "version": 2
  }
}