Pith Number

pith:YH52Z2O7

pith:2001:YH52Z2O777PR5NMGJPBFEXUJSS

not attested not anchored not stored refs pending

Age-Dating Ultraluminous Infrared Galaxies Along the Merger Sequence

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

arxiv:astro-ph/0103425 v2 · 2001-03-26 · 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{YH52Z2O777PR5NMGJPBFEXUJSS}

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	2026-07-04T16:22:56.314778Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c1fbace9dfffdf1eb5864bc2525e899482fdd749ed8047367a1382ef9db354a9

Aliases

arxiv: astro-ph/0103425 · arxiv_version: astro-ph/0103425v2 · doi: 10.48550/arxiv.astro-ph/0103425 · pith_short_12: YH52Z2O777PR · pith_short_16: YH52Z2O777PR5NMG · pith_short_8: YH52Z2O7

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/YH52Z2O777PR5NMGJPBFEXUJSS \
  | 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: c1fbace9dfffdf1eb5864bc2525e899482fdd749ed8047367a1382ef9db354a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "33a7ef087fd50c0e085c32fe4869616f0145a9c449520e2e226dbc150ef06a00",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-03-26T20:48:18Z",
    "title_canon_sha256": "3dcd262ed33e25ad9719feb252975689022e714978d11b03d0891c8c04528a28"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0103425",
    "kind": "arxiv",
    "version": 2
  }
}