Pith Number

pith:P7SW7XH3

pith:2018:P7SW7XH3TQCPOATLSJCFMUKK7M

not attested not anchored not stored refs pending

Science with an ngVLA: Precision Gas-dynamical Mass Measurement of Supermassive Black Holes with the ngVLA

Benjamin D. Boizelle, Kristina Nyland, Timothy A. Davis

arxiv:1810.06615 v1 · 2018-10-15 · 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{P7SW7XH3TQCPOATLSJCFMUKK7M}

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	2026-05-18T00:03:12.193986Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7fe56fdcfb9c04f7026b924456514afb0efc038841a73bac470fc35836ab3b10

Aliases

arxiv: 1810.06615 · arxiv_version: 1810.06615v1 · doi: 10.48550/arxiv.1810.06615 · pith_short_12: P7SW7XH3TQCP · pith_short_16: P7SW7XH3TQCPOATL · pith_short_8: P7SW7XH3

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/P7SW7XH3TQCPOATLSJCFMUKK7M \
  | 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: 7fe56fdcfb9c04f7026b924456514afb0efc038841a73bac470fc35836ab3b10

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7c8ebb3f23d5325fd9560914a89945564046365336be79f781e8f8585899984",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-10-15T19:00:55Z",
    "title_canon_sha256": "d821c36726c25231a4d9499c78c1a7410b9ab79926cb9b3a657cda4f0cdb450e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.06615",
    "kind": "arxiv",
    "version": 1
  }
}