Pith Number

pith:FRRX4RIR

pith:1999:FRRX4RIRN7LCT4V7247Y7JJ42G

not attested not anchored not stored refs pending

A small source in Q2237+0305 ?

E. L. Turner, J. S. B. Wyithe, R. L. Webster

arxiv:astro-ph/9911245 v2 · 1999-11-15 · 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{FRRX4RIRN7LCT4V7247Y7JJ42G}

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	2026-07-04T16:11:54.249153Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2c637e45116fd629f2bfd73f8fa53cd19c06fe953cef49190bab29031eb4206f

Aliases

arxiv: astro-ph/9911245 · arxiv_version: astro-ph/9911245v2 · doi: 10.48550/arxiv.astro-ph/9911245 · pith_short_12: FRRX4RIRN7LC · pith_short_16: FRRX4RIRN7LCT4V7 · pith_short_8: FRRX4RIR

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/FRRX4RIRN7LCT4V7247Y7JJ42G \
  | 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: 2c637e45116fd629f2bfd73f8fa53cd19c06fe953cef49190bab29031eb4206f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c9a5b4a7bb0c2dca967ecc079c6414dc547894c39ee23354e8fbfc44a62bdd7f",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-11-15T17:15:30Z",
    "title_canon_sha256": "fa1647b2407b0ebbceddd341b3c1a28698756f386c8e6f7c6b1462ff159e9856"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9911245",
    "kind": "arxiv",
    "version": 2
  }
}