Pith Number

pith:V2K4Y4MF

pith:2012:V2K4Y4MFLKQ5QUHDT5QRXUXUAS

not attested not anchored not stored refs pending

A search for 21 cm HI absorption in AT20G compact radio galaxies

2), (2) ARC Centre of Excellence for All-sky Astrophysics, (3) CSIRO Astronomy, (4) The Netherlands Institute for Radio Astronomy, 5), (5) University of Groningen, (6) University of New South Wales, (7) European Southern Observatory), A. Tanna (6), B. H. C. Emonts (3), E. K. Mahony (1, E. M. Sadler (1, J. R. Allison (1), K. Gareb (4, M. A. Zwaan (7) ((1) University of Sydney, M. T. Whiting (3), S. J. Curran (1, Space Science, S. Reeves (1

arxiv:1204.1391 v2 · 2012-04-06 · 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{V2K4Y4MFLKQ5QUHDT5QRXUXUAS}

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	2026-05-18T01:57:56.295341Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ae95cc71855aa1d850e39f611bd2f404afe8a0d5addce313954b5f971bbcaa8d

Aliases

arxiv: 1204.1391 · arxiv_version: 1204.1391v2 · doi: 10.48550/arxiv.1204.1391 · pith_short_12: V2K4Y4MFLKQ5 · pith_short_16: V2K4Y4MFLKQ5QUHD · pith_short_8: V2K4Y4MF

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/V2K4Y4MFLKQ5QUHDT5QRXUXUAS \
  | 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: ae95cc71855aa1d850e39f611bd2f404afe8a0d5addce313954b5f971bbcaa8d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "92f969438d298826750fb7b0235f0d83c83b1a6954d78a4bb94cace65dc8b56f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-04-06T01:33:31Z",
    "title_canon_sha256": "74f34f65ad7e46ad832077027ec14fcf7e618e9543b9023fe1244b748abc8813"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.1391",
    "kind": "arxiv",
    "version": 2
  }
}