Pith Number

pith:DY67OAKZ

pith:2017:DY67OAKZCMS544RRWZDW5PYYVP

not attested not anchored not stored refs pending

How to Detect Inclined Water Maser Disks (and Possibly Measure Black Hole Masses)

Jeremy Darling

arxiv:1702.06545 v1 · 2017-02-21 · 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{DY67OAKZCMS544RRWZDW5PYYVP}

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	2026-05-18T00:48:46.464708Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e3df701591325de7231b6476ebf18abc561961a61a67484f208294bb29518bf

Aliases

arxiv: 1702.06545 · arxiv_version: 1702.06545v1 · doi: 10.48550/arxiv.1702.06545 · pith_short_12: DY67OAKZCMS5 · pith_short_16: DY67OAKZCMS544RR · pith_short_8: DY67OAKZ

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/DY67OAKZCMS544RRWZDW5PYYVP \
  | 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: 1e3df701591325de7231b6476ebf18abc561961a61a67484f208294bb29518bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78d5b37e40193bc29afedfccd7bd5f753e5e8eb63f0760484b098003c5faad15",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2017-02-21T19:00:13Z",
    "title_canon_sha256": "30eafdadf4cbe913855778d71daa111841f8641b7a83de2d5b7db534d47b7ae8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.06545",
    "kind": "arxiv",
    "version": 1
  }
}