Pith Number

pith:Y5T7ZC6D

pith:2011:Y5T7ZC6DO5MO47CPDDOOW3UDSB

not attested not anchored not stored refs pending

The Central Region of the Nearby Seyfert 2 Galaxy NGC 4945 : A Pair of Spirals

David C.C. Yen, J. Lim, Lien-Hsuan Lin, Ronald E. Taam, S. Muller

arxiv:1102.2246 v1 · 2011-02-10 · 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{Y5T7ZC6DO5MO47CPDDOOW3UDSB}

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	2026-05-18T02:03:12.331133Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c767fc8bc37758ee7c4f18dceb6e839044a8f06ee43b81c402be8b1c2cd8f9f7

Aliases

arxiv: 1102.2246 · arxiv_version: 1102.2246v1 · doi: 10.48550/arxiv.1102.2246 · pith_short_12: Y5T7ZC6DO5MO · pith_short_16: Y5T7ZC6DO5MO47CP · pith_short_8: Y5T7ZC6D

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/Y5T7ZC6DO5MO47CPDDOOW3UDSB \
  | 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: c767fc8bc37758ee7c4f18dceb6e839044a8f06ee43b81c402be8b1c2cd8f9f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9822b0b4c9032d75895821ca92e473844d053f1f446266676a4611f84b50cb8f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-02-10T21:55:24Z",
    "title_canon_sha256": "1793d5358f0edaa542ea6d5125db6a076f34b02d0c70633a91e9ff35facdc97d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.2246",
    "kind": "arxiv",
    "version": 1
  }
}