Pith Number

pith:Z23FMQMZ

pith:1999:Z23FMQMZ5NA2SQJF475Z2M4XM4

not attested not anchored not stored refs pending

The CASTLES project

((1) Harvard-Smithsonian Center for Astrophysics, AZ), B. A. McLeod (1), Cambridge, C. D. Impey (2), C. S. Kochanek (1), C. Y. Peng (2), E. E. Falco (1), H.-W. Rix (2), J. A. Munoz (1), J. Lehar (1), MA (2) Steward Observatory, Tucson, University of Arizona

arxiv:astro-ph/9902131 v1 · 1999-02-08 · 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{Z23FMQMZ5NA2SQJF475Z2M4XM4}

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	2026-07-04T16:10:41.895589Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ceb6564199eb41a94125e7fb9d339767281c0ea97bdffdd58f8a9f48576e662c

Aliases

arxiv: astro-ph/9902131 · arxiv_version: astro-ph/9902131v1 · doi: 10.48550/arxiv.astro-ph/9902131 · pith_short_12: Z23FMQMZ5NA2 · pith_short_16: Z23FMQMZ5NA2SQJF · pith_short_8: Z23FMQMZ

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/Z23FMQMZ5NA2SQJF475Z2M4XM4 \
  | 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: ceb6564199eb41a94125e7fb9d339767281c0ea97bdffdd58f8a9f48576e662c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "113166022b529efe8a809012d65b4d861875bcfdee6af7917c7b322c87e0ecd4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-02-08T21:37:08Z",
    "title_canon_sha256": "58c8a1c9c98d7ea07e408c3e54684ace4e115cab890e6f433dfd7af68c9b0070"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9902131",
    "kind": "arxiv",
    "version": 1
  }
}