Pith Number

pith:3BX2WFZB

pith:2009:3BX2WFZBIBFWONOCRTTEHARZ7W

not attested not anchored not stored refs pending

On the nuclear obscuration of H2O maser galaxies

C. Henkel, H.G. Wang, J.H. Fan, J.S. Zhang, Q. Guo

arxiv:0912.2159 v1 · 2009-12-11 · astro-ph.CO · 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{3BX2WFZBIBFWONOCRTTEHARZ7W}

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	2026-05-18T02:33:56.866064Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d86fab1721404b6735c28ce6438239fdac343faf112a307f174f1b1b2d3c3aa7

Aliases

arxiv: 0912.2159 · arxiv_version: 0912.2159v1 · doi: 10.48550/arxiv.0912.2159 · pith_short_12: 3BX2WFZBIBFW · pith_short_16: 3BX2WFZBIBFWONOC · pith_short_8: 3BX2WFZB

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/3BX2WFZBIBFWONOCRTTEHARZ7W \
  | 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: d86fab1721404b6735c28ce6438239fdac343faf112a307f174f1b1b2d3c3aa7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "023c739df1b5897f53410e1f247830aaafe1953482f2eca424fe0c1348a20c64",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-11T07:41:25Z",
    "title_canon_sha256": "c79c76d5687cecf7563d823777a1cb4af35d0a67cfeac051c19724b3bab34cbe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2159",
    "kind": "arxiv",
    "version": 1
  }
}