Pith Number

pith:QGCNK747

pith:2009:QGCNK747FFQFWE27LAINKTFVFA

not attested not anchored not stored refs pending

The Nuclear Ring in the Barred Spiral Galaxy IC 4933

(2) University of Leicester, (3) Australian National University), Catherine Farage (3) ((1) AAO, Robert Sharp (1), Samuel Illingworth (2), Stuart D. Ryder (1)

arxiv:0909.1371 v2 · 2009-09-08 · 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{QGCNK747FFQFWE27LAINKTFVFA}

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	2026-05-18T02:11:58.704144Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8184d57f9f29605b135f5810d54cb5282205ca5cc391255808572b91d86465c8

Aliases

arxiv: 0909.1371 · arxiv_version: 0909.1371v2 · doi: 10.48550/arxiv.0909.1371 · pith_short_12: QGCNK747FFQF · pith_short_16: QGCNK747FFQFWE27 · pith_short_8: QGCNK747

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/QGCNK747FFQFWE27LAINKTFVFA \
  | 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: 8184d57f9f29605b135f5810d54cb5282205ca5cc391255808572b91d86465c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "909cf40f607e66751c0be6d3ed98ee27f9484db61c7e0577b3298f6143b354af",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-09-08T02:00:02Z",
    "title_canon_sha256": "b27d1f7e61feea355de57c47c341e904e8de59b12e0640b607817a754447a4d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.1371",
    "kind": "arxiv",
    "version": 2
  }
}