Pith Number

pith:IFPZUUOC

pith:2009:IFPZUUOCVEENHA5CKEKXPPDQEH

not attested not anchored not stored refs pending

Pixel-lensing as a way to detect extrasolar planets in M31

A.A. Nucita, A.F. Zakharov, F. De Paolis, G. Ingrosso, Ph. Jetzer, S. Calchi Novati

arxiv:0906.1050 v1 · 2009-06-05 · astro-ph.SR · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IFPZUUOCVEENHA5CKEKXPPDQEH}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T04:37:34.070752Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

415f9a51c2a908d383a2511577bc7021ca738c440f9c7401d9775d604d7012b5

Aliases

arxiv: 0906.1050 · arxiv_version: 0906.1050v1 · doi: 10.48550/arxiv.0906.1050 · pith_short_12: IFPZUUOCVEEN · pith_short_16: IFPZUUOCVEENHA5C · pith_short_8: IFPZUUOC

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/IFPZUUOCVEENHA5CKEKXPPDQEH \
  | 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: 415f9a51c2a908d383a2511577bc7021ca738c440f9c7401d9775d604d7012b5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d45f70a4c05853793baccbb4a9a2b3fc9d1c2599c510a172c752dda470b1576e",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-06-05T07:40:16Z",
    "title_canon_sha256": "b6a595e73a1c5008ddf101c228c18948a47c6ea8e512ecfc837efebde41a8c9a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.1050",
    "kind": "arxiv",
    "version": 1
  }
}