Pith Number

pith:Z27DPOZ5

pith:2013:Z27DPOZ5P76KLC4YFY6XSPHTNW

not attested not anchored not stored refs pending

Finding extraterrestrial life using ground-based high-resolution spectroscopy

Ignas Snellen, Jayne Birkby, Matteo Brogi, Remco de Kok, Rudolf le Poole

arxiv:1302.3251 v1 · 2013-02-13 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z27DPOZ5P76KLC4YFY6XSPHTNW}

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	2026-05-18T01:51:41.553223Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cebe37bb3d7ffca58b982e3d793cf36d9f932027e6a11e2662d9820601948def

Aliases

arxiv: 1302.3251 · arxiv_version: 1302.3251v1 · doi: 10.48550/arxiv.1302.3251 · pith_short_12: Z27DPOZ5P76K · pith_short_16: Z27DPOZ5P76KLC4Y · pith_short_8: Z27DPOZ5

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/Z27DPOZ5P76KLC4YFY6XSPHTNW \
  | 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: cebe37bb3d7ffca58b982e3d793cf36d9f932027e6a11e2662d9820601948def

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9dbaa1257aa99fb88202344cc0858db9bcd9b75c7d1ac2eaa806b27e94dff0e6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2013-02-13T21:44:59Z",
    "title_canon_sha256": "914c5aec2babea39e36a3b47059e13cf2597ec6fc7689f004890ff67b1ceea73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.3251",
    "kind": "arxiv",
    "version": 1
  }
}