Pith Number

pith:WOX4CJNJ

pith:2008:WOX4CJNJA4R3TSTDEOHBLXNYWI

not attested not anchored not stored refs pending

The role of the charge state of PAHs in ultraviolet extinction

C. Cecchi-Pestellini, C. Joblin, D. A. Williams, G. Malloci, G. Mulas

arxiv:0804.3930 v3 · 2008-04-24 · 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{WOX4CJNJA4R3TSTDEOHBLXNYWI}

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	2026-07-04T17:10:29.832282Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b3afc125a90723b9ca63238e15ddb8b21d0070c2cec38068cb967850ed647b8c

Aliases

arxiv: 0804.3930 · arxiv_version: 0804.3930v3 · doi: 10.48550/arxiv.0804.3930 · pith_short_12: WOX4CJNJA4R3 · pith_short_16: WOX4CJNJA4R3TSTD · pith_short_8: WOX4CJNJ

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/WOX4CJNJA4R3TSTDEOHBLXNYWI \
  | 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: b3afc125a90723b9ca63238e15ddb8b21d0070c2cec38068cb967850ed647b8c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f02f759074f3e92524ce70a6f87f4d468af5f3bf294ec36070d01504dbe28b46",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-04-24T14:11:33Z",
    "title_canon_sha256": "87fe3db42d95fe1cd702c4938b3660541be9f941336c89a23bcb57cb18eb774d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0804.3930",
    "kind": "arxiv",
    "version": 3
  }
}