Pith Number

pith:TW25S6XQ

pith:2012:TW25S6XQZXKWV6NSI7CFLQUIJ5

not attested not anchored not stored refs pending

Observing the Earth as an exoplanet with LOUPE, the Lunar Observatory for Unresolved Polarimetry of Earth

C.U. Keller, D.M. Stam, F. Snik, S. Bagnulo, T. Karalidi, W.B. Sparks

arxiv:1203.0209 v1 · 2012-03-01 · astro-ph.EP · 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{TW25S6XQZXKWV6NSI7CFLQUIJ5}

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	2026-05-18T01:58:17.826340Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9db5d97af0cdd56af9b247c455c2884f4690869314354044788c77f77e1e2ede

Aliases

arxiv: 1203.0209 · arxiv_version: 1203.0209v1 · doi: 10.48550/arxiv.1203.0209 · pith_short_12: TW25S6XQZXKW · pith_short_16: TW25S6XQZXKWV6NS · pith_short_8: TW25S6XQ

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/TW25S6XQZXKWV6NSI7CFLQUIJ5 \
  | 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: 9db5d97af0cdd56af9b247c455c2884f4690869314354044788c77f77e1e2ede

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8af69a94eab7364c4ba3948e257b616012e0487713776e26b8453e16b7225b64",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2012-03-01T15:05:46Z",
    "title_canon_sha256": "a679451289156fdb691bbab4d85772c1c1441dca618027787c9008f8db3b1aec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.0209",
    "kind": "arxiv",
    "version": 1
  }
}