Pith Number

pith:I4WEP7PM

pith:2002:I4WEP7PMCU6AUZ725DBQ4MQUVS

not attested not anchored not stored refs pending

Detailed analysis of Balmer lines in cool dwarf stars

(2) Univ. of Texas, (3) Univ. of Queensland), Austin, B.J. O'Mara (3) ((1) Uppsala Univ., C. Allende Prieto (2), H.C. Stempels (1), N. Piskunov (1), O.P. Kochukhov (1), P.S. Barklem (1)

arxiv:astro-ph/0201537 v1 · 2002-01-31 · 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{I4WEP7PMCU6AUZ725DBQ4MQUVS}

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	2026-07-04T16:29:20.607531Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

472c47fdec153c0a67fae8c30e3214ac97c4d00175adf9c2a04a47ec4208fac7

Aliases

arxiv: astro-ph/0201537 · arxiv_version: astro-ph/0201537v1 · doi: 10.48550/arxiv.astro-ph/0201537 · pith_short_12: I4WEP7PMCU6A · pith_short_16: I4WEP7PMCU6AUZ72 · pith_short_8: I4WEP7PM

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/I4WEP7PMCU6AUZ725DBQ4MQUVS \
  | 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: 472c47fdec153c0a67fae8c30e3214ac97c4d00175adf9c2a04a47ec4208fac7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0c8e168e0549f1a8e735369d597ae7dd19f3e4ccb407497b7f8a6799e354cb8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-01-31T16:51:31Z",
    "title_canon_sha256": "60d96473773eb8c4908af7648fc41bb6a8e927c7a83bc4d94ddba1bb71768aed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0201537",
    "kind": "arxiv",
    "version": 1
  }
}