Pith Number

pith:ZZ4BNFOJ

pith:2009:ZZ4BNFOJFURC3GB3Y6N5MNFSQA

not attested not anchored not stored refs pending

Real-time optical spectroscopy of VUV irradiated pyrene:H_2O interstellar ice

D. M. Paardekooper, H. Linnartz, H. M. Cuppen, J. Bouwman, L. J. Allamandola

arxiv:0906.1513 v2 · 2009-06-08 · astro-ph.IM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZZ4BNFOJFURC3GB3Y6N5MNFSQA}

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	2026-07-04T15:47:24.516199Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ce781695c92d222d983bc79bd634b2800820bc4184dc415d6f6a3456a9d3dfdc

Aliases

arxiv: 0906.1513 · arxiv_version: 0906.1513v2 · doi: 10.48550/arxiv.0906.1513 · pith_short_12: ZZ4BNFOJFURC · pith_short_16: ZZ4BNFOJFURC3GB3 · pith_short_8: ZZ4BNFOJ

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/ZZ4BNFOJFURC3GB3Y6N5MNFSQA \
  | 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: ce781695c92d222d983bc79bd634b2800820bc4184dc415d6f6a3456a9d3dfdc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8c476c83e593abae0dccb0c2815b09e1af79d6952223085033f2ecb956a697ff",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2009-06-08T15:01:13Z",
    "title_canon_sha256": "6a647e0e9e5d6eb6fbf463d830626a5b179ce8580a1614c4f2738aaf1a2e0c1a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.1513",
    "kind": "arxiv",
    "version": 2
  }
}