Pith Number

pith:VONXGDVY

pith:2009:VONXGDVY6OGWDM2L7LTJI3EWE3

not attested not anchored not stored refs pending

Is Centaurus A special? A neutral hydrogen perspective

2), Bjorn H.C. Emonts (3) ((1) Netherlands Foundation for Research in Astronomy (2) Kapteyn Institute, Christian Struve (1, Raffaella Morganti (1, Tom A. Oosterloo (1, University of Groningen (3) CSIRO Australia Telescope National Facility)

arxiv:0910.4238 v1 · 2009-10-22 · 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{VONXGDVY6OGWDM2L7LTJI3EWE3}

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	2026-05-18T02:11:12.861294Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ab9b730eb8f38d61b34bfae6946c9626d5115c0f7c79925034cd4c72038420f5

Aliases

arxiv: 0910.4238 · arxiv_version: 0910.4238v1 · doi: 10.48550/arxiv.0910.4238 · pith_short_12: VONXGDVY6OGW · pith_short_16: VONXGDVY6OGWDM2L · pith_short_8: VONXGDVY

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/VONXGDVY6OGWDM2L7LTJI3EWE3 \
  | 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: ab9b730eb8f38d61b34bfae6946c9626d5115c0f7c79925034cd4c72038420f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "615b7cfe4100e7cdfa527f09130c2dabe041f790f5f547906bba121c19c0622a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-22T08:00:24Z",
    "title_canon_sha256": "5d94d3075fe370c14923466b71314aa580db91b1fbc0bc5ac72501dc1121e1a8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.4238",
    "kind": "arxiv",
    "version": 1
  }
}