Pith Number

pith:Q64BJQYV

pith:1998:Q64BJQYVXK3PUO5DTDRY4CUBNH

not attested not anchored not stored refs pending

Stellar Variability Background in OGLE-I Microlensing Search

(2) Warsaw University Observatory), Michal Szymanski (2) ((1) Princeton University Observatory, Przemyslaw Wozniak (1)

arxiv:astro-ph/9804193 v1 · 1998-04-20 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q64BJQYVXK3PUO5DTDRY4CUBNH}

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	2026-07-04T14:15:46.243863Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

87b814c315bab6fa3ba398e38e0a8169fb01ba11e089a38e84f496d6dbacec3a

Aliases

arxiv: astro-ph/9804193 · arxiv_version: astro-ph/9804193v1 · doi: 10.48550/arxiv.astro-ph/9804193 · pith_short_12: Q64BJQYVXK3P · pith_short_16: Q64BJQYVXK3PUO5D · pith_short_8: Q64BJQYV

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/Q64BJQYVXK3PUO5DTDRY4CUBNH \
  | 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: 87b814c315bab6fa3ba398e38e0a8169fb01ba11e089a38e84f496d6dbacec3a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad3bd0eb77feb9139e1f0d27e2e60c3eb7c79125e82866bb40105c32802b064a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-04-20T17:16:34Z",
    "title_canon_sha256": "165c8adcb1a894a06f79d18840962160949f5ad9ca20c1f47bf3f49f58f61343"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9804193",
    "kind": "arxiv",
    "version": 1
  }
}