Pith Number

pith:45S3MLOO

pith:1999:45S3MLOORWQOP5AYPE6PES7KEL

not attested not anchored not stored refs pending

V2109 Cygni, a second overtone field RR Lyrae star

B. Csak, J.R. Thomson, J. Vinko, L.L. Kiss

arxiv:astro-ph/9902091 v1 · 1999-02-05 · 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{45S3MLOORWQOP5AYPE6PES7KEL}

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	2026-05-18T01:07:36.605091Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e765b62dce8da0e7f418793cf24bea22c58ab0b4ebfecdff2ec18336759c3cec

Aliases

arxiv: astro-ph/9902091 · arxiv_version: astro-ph/9902091v1 · doi: 10.48550/arxiv.astro-ph/9902091 · pith_short_12: 45S3MLOORWQO · pith_short_16: 45S3MLOORWQOP5AY · pith_short_8: 45S3MLOO

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/45S3MLOORWQOP5AYPE6PES7KEL \
  | 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: e765b62dce8da0e7f418793cf24bea22c58ab0b4ebfecdff2ec18336759c3cec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4e5c9954aa64bc4e6191ff3e9ccc8ea45b9e636d51e2d44bb43e75e61003f82",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-02-05T11:21:24Z",
    "title_canon_sha256": "5d8318b2489941f17cf485cba2c13ec3dac66b8b43a6e6681f2844dbdf32517e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9902091",
    "kind": "arxiv",
    "version": 1
  }
}