Pith Number

pith:N4OHXSW2

pith:2009:N4OHXSW2VKWIJOAQBSQMPST7LC

not attested not anchored not stored refs pending

Direct Evidence of Cold Gas in DLA 0812+32B

(2) UC San Diego, (3) UC Santa Cruz), Arthur M. Wolfe (2), Cambridge, J. Xavier Prochaska (3), Regina A. Jorgenson (1), Robert F. Carswell (1) ((1) Institute of Astronomy

arxiv:0908.3485 v1 · 2009-08-24 · 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{N4OHXSW2VKWIJOAQBSQMPST7LC}

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	2026-05-18T02:12:23.451728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6f1c7bcadaaaac84b8100ca0c7ca7f58a7c7111ed37969ecfd2fec6b602ec626

Aliases

arxiv: 0908.3485 · arxiv_version: 0908.3485v1 · doi: 10.48550/arxiv.0908.3485 · pith_short_12: N4OHXSW2VKWI · pith_short_16: N4OHXSW2VKWIJOAQ · pith_short_8: N4OHXSW2

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/N4OHXSW2VKWIJOAQBSQMPST7LC \
  | 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: 6f1c7bcadaaaac84b8100ca0c7ca7f58a7c7111ed37969ecfd2fec6b602ec626

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df0a27b4fa6c39ff82816015999962d300cf603061381ebfd550dfeca1b288b6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-08-24T20:01:26Z",
    "title_canon_sha256": "f694d3b3f26f5e1c13647ba819d061a732092d7dfbe1fe684548894524fc1a72"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3485",
    "kind": "arxiv",
    "version": 1
  }
}