Pith Number

pith:4WM3XR2U

pith:2000:4WM3XR2UKV56PLYBUZNN34PTYX

not attested not anchored not stored refs pending

The Active Nucleus in the Ultraluminous Infrared Galaxy IRAS 08311-2459

B. T. Soifer, K. Matthews, L. Armus, T. W. Murphy Jr.

arxiv:astro-ph/0006318 v1 · 2000-06-22 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4WM3XR2UKV56PLYBUZNN34PTYX}

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	2026-07-04T16:16:49.379953Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e599bbc754557be7af01a65addf1f3c5f55c14f7719166619137b68702a74e41

Aliases

arxiv: astro-ph/0006318 · arxiv_version: astro-ph/0006318v1 · doi: 10.48550/arxiv.astro-ph/0006318 · pith_short_12: 4WM3XR2UKV56 · pith_short_16: 4WM3XR2UKV56PLYB · pith_short_8: 4WM3XR2U

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/4WM3XR2UKV56PLYBUZNN34PTYX \
  | 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: e599bbc754557be7af01a65addf1f3c5f55c14f7719166619137b68702a74e41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a964b4f1c7f4cd90e47966256d408836b8938038bf78df5815456131e2dd7898",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-06-22T00:39:16Z",
    "title_canon_sha256": "d751f34f753d12b000b93585e95a6649dcf4e103c3fb84d283db4ea3d99065ab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0006318",
    "kind": "arxiv",
    "version": 1
  }
}