Pith Number

pith:PPP2T44H

pith:2011:PPP2T44HHWY2UX6KPV5QKZ4OUR

not attested not anchored not stored refs pending

Hanny's Voorwerp: a nuclear starburst in IC2497

2), 5), Dept. Physics 8. Univ. Alabama, Dept. Physics & Astronomy), G. I. G. Jozsa (1), H. Rampadarath (3), H. van Arkel (1), Joint Institute for VLBI in Europe. 7. Univ. Yale, K. Schawinski (7), M. A. Garrett (1, Netherlands Institute for Radio Astronomy. 2. Leiden Observatory, R. Beswick (4), T. A. Oosterloo (1, T. W. B. Muxlow (4), University of Leiden. 3. Curtin University of Technology 4. Jodrell Bank Centre for Astrophysics. 5. Kapteyn Astronomical Institute, Univ. Groningen. 6. JIVE, W. C. Keel (8) (1. ASTRON, Z. Paragi (6)

arxiv:1101.2784 v1 · 2011-01-14 · 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{PPP2T44HHWY2UX6KPV5QKZ4OUR}

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	2026-05-18T04:31:31.756782Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7bdfa9f3873db1aa5fca7d7b05678ea44f62dc62e2398e1c4717a93a3fc87834

Aliases

arxiv: 1101.2784 · arxiv_version: 1101.2784v1 · doi: 10.48550/arxiv.1101.2784 · pith_short_12: PPP2T44HHWY2 · pith_short_16: PPP2T44HHWY2UX6K · pith_short_8: PPP2T44H

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/PPP2T44HHWY2UX6KPV5QKZ4OUR \
  | 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: 7bdfa9f3873db1aa5fca7d7b05678ea44f62dc62e2398e1c4717a93a3fc87834

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ee97219aa44f5bcf4ada89d0ee9621c64dc219cb2e00a323843861729b1114b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-01-14T12:32:30Z",
    "title_canon_sha256": "051124b51d0e8c6b2d8bbb366ea39d132e02d16687d097e56a2094f1e843d176"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.2784",
    "kind": "arxiv",
    "version": 1
  }
}