Pith Number

pith:NCWQO554

pith:2018:NCWQO5544WTO3MY52AGEXLDJ25

not attested not anchored not stored refs pending

A high-resolution mosaic of the neutral hydrogen in the M81 triplet

Adam K. Leroy, Annette M. N. Ferguson, Edouard J. Bernard, Fabian Walter, Glen Langston, J.M. van der Hulst, Juergen Ott, Katie M. Keating, Laura K. Zschaechner, Marcel Neeleman, Martin A. Zwaan, Min S. Yun, W.J.G. de Blok

arxiv:1808.02840 v1 · 2018-08-08 · 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{NCWQO5544WTO3MY52AGEXLDJ25}

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	2026-05-18T00:03:45.784416Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68ad0777bce5a6edb31dd00c4bac69d77f83732937f04099a4e2b49fffde4ac8

Aliases

arxiv: 1808.02840 · arxiv_version: 1808.02840v1 · doi: 10.48550/arxiv.1808.02840 · pith_short_12: NCWQO5544WTO · pith_short_16: NCWQO5544WTO3MY5 · pith_short_8: NCWQO554

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/NCWQO5544WTO3MY52AGEXLDJ25 \
  | 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: 68ad0777bce5a6edb31dd00c4bac69d77f83732937f04099a4e2b49fffde4ac8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eee2e7a2ac03e112c20d27a1ff004e76be30d2478326107112c9aea6b0e2fa74",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-08-08T15:57:48Z",
    "title_canon_sha256": "22efbabb3b1441c8fb13c5374b96d3bab874a2e64a97eba7f58dcbd045549550"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.02840",
    "kind": "arxiv",
    "version": 1
  }
}