Pith Number

pith:UGZYKN2F

pith:2002:UGZYKN2FGWZ4ZXR6PT345CSVTY

not attested not anchored not stored refs pending

Echelle spectroscopy of Ca II HK activity in Southern Hemisphere planet search targets

Alan J. Penny, Brad D. Carter, C. G. Tinney, Chris McCarthy, Geoffrey W. Marcy, Hugh R.A. Jones, R. Paul Butler

arxiv:astro-ph/0201494 v1 · 2002-01-30 · 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{UGZYKN2FGWZ4ZXR6PT345CSVTY}

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	2026-05-18T04:27:05.235783Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1b385374535b3ccde3e7cf7ce8a559e3df8e4454c30c14b1a2945bc4d2b5461

Aliases

arxiv: astro-ph/0201494 · arxiv_version: astro-ph/0201494v1 · doi: 10.48550/arxiv.astro-ph/0201494 · pith_short_12: UGZYKN2FGWZ4 · pith_short_16: UGZYKN2FGWZ4ZXR6 · pith_short_8: UGZYKN2F

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/UGZYKN2FGWZ4ZXR6PT345CSVTY \
  | 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: a1b385374535b3ccde3e7cf7ce8a559e3df8e4454c30c14b1a2945bc4d2b5461

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b05664911067cba7b635c155b53e12974e95835cec802feff63bc8362adcfdaf",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-01-30T00:30:33Z",
    "title_canon_sha256": "38275a70a3f08f00a7197e294d86dedc95e2bc05ae9a5aac2c07dfa23dfa983d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0201494",
    "kind": "arxiv",
    "version": 1
  }
}