Pith Number

pith:DWZOFHQB

pith:2004:DWZOFHQBVIPN3E2DGS4TKFCAZQ

not attested not anchored not stored refs pending

Cold Neutral Gas in a z=4.2 Damped Lyman-alpha System: The Fuel for Star Formation

Arthur M. Wolfe (UCSD), Jason X. Prochaska (UCSC), J. Christopher Howk

arxiv:astro-ph/0404005 v2 · 2004-03-31 · 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{DWZOFHQBVIPN3E2DGS4TKFCAZQ}

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	2026-07-04T16:43:30.163660Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1db2e29e01aa1edd934334b9351440cc35860af61e18de6c6362a67750dafb03

Aliases

arxiv: astro-ph/0404005 · arxiv_version: astro-ph/0404005v2 · doi: 10.48550/arxiv.astro-ph/0404005 · pith_short_12: DWZOFHQBVIPN · pith_short_16: DWZOFHQBVIPN3E2D · pith_short_8: DWZOFHQB

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/DWZOFHQBVIPN3E2DGS4TKFCAZQ \
  | 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: 1db2e29e01aa1edd934334b9351440cc35860af61e18de6c6362a67750dafb03

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a351b35437525f59b8febb422e6c154aee08fb9d7f5f0ef2efd1db6a8d85560",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-03-31T21:54:56Z",
    "title_canon_sha256": "a52d41b704ee773efc96697875f22e286747d70bf2d5e2d83ac1e85fe854795d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0404005",
    "kind": "arxiv",
    "version": 2
  }
}