Pith Number

pith:Q2KSTQ5Y

pith:2009:Q2KSTQ5YZEAYYFONRZH7V53J5N

not attested not anchored not stored refs pending

On the intensity interferometry and the second-order correlation function $g^{(2)}$ in astrophysics

C. Foellmi

arxiv:0901.4587 v2 · 2009-01-28 · 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{Q2KSTQ5YZEAYYFONRZH7V53J5N}

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	2026-05-18T02:14:55.333897Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

869529c3b8c9018c15cd8e4ffaf769eb41ddee16ef278da80c23855c28b3de57

Aliases

arxiv: 0901.4587 · arxiv_version: 0901.4587v2 · doi: 10.48550/arxiv.0901.4587 · pith_short_12: Q2KSTQ5YZEAY · pith_short_16: Q2KSTQ5YZEAYYFON · pith_short_8: Q2KSTQ5Y

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/Q2KSTQ5YZEAYYFONRZH7V53J5N \
  | 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: 869529c3b8c9018c15cd8e4ffaf769eb41ddee16ef278da80c23855c28b3de57

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "62df9c83b2556588a91c605cd81597f0cb52511615c51ffa7e6bc2db40455477",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2009-01-28T23:59:12Z",
    "title_canon_sha256": "85b4c9e73d9772f75d367615d88bf0aa2bca65ff0af4ff2a02a6c560f825344a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4587",
    "kind": "arxiv",
    "version": 2
  }
}