Pith Number

pith:W4W4VDYX

pith:2009:W4W4VDYXT5GHZLBIEMMKJCWXUI

not attested not anchored not stored refs pending

Molecular Clouds as Cosmic-Ray Barometers

A. Kawamura, D. I. Jones, F. A. Aharonian, G. Rowell, H. Yamamoto, K. Torii, S. Casanova, S. Gabici, T. Onishi, Y. Fukui

arxiv:0904.2887 v2 · 2009-04-20 · astro-ph.HE · 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{W4W4VDYXT5GHZLBIEMMKJCWXUI}

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	2026-05-18T02:13:59.123297Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b72dca8f179f4c7cac282318a48ad7a21861ffd8b81fa2d9f172de8584ad3066

Aliases

arxiv: 0904.2887 · arxiv_version: 0904.2887v2 · doi: 10.48550/arxiv.0904.2887 · pith_short_12: W4W4VDYXT5GH · pith_short_16: W4W4VDYXT5GHZLBI · pith_short_8: W4W4VDYX

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/W4W4VDYXT5GHZLBIEMMKJCWXUI \
  | 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: b72dca8f179f4c7cac282318a48ad7a21861ffd8b81fa2d9f172de8584ad3066

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "014592d2bfb7a894a5da41da2a820ce24b52ea231e4a4fa78a4d22ed5f76f02d",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2009-04-20T06:40:06Z",
    "title_canon_sha256": "bb5ad1f077471504f8389615b56b5893f24bfa6927fb0a74508d23ecaa56bf66"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2887",
    "kind": "arxiv",
    "version": 2
  }
}