Pith Number

pith:3G57KXKV

pith:2003:3G57KXKVBNMK5UKJNA2NPJWMWV

not attested not anchored not stored refs pending

Spectral analysis of sdB stars from the Hamburg Quasar Survey

D. Engels, H. Edelmann, H.-J. Hagen, M. Lemke, R. Napiwotzki, S. Dreizler, U. Heber

arxiv:astro-ph/0301602 v1 · 2003-01-30 · 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{3G57KXKVBNMK5UKJNA2NPJWMWV}

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	2026-05-18T04:21:42.035660Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d9bbf55d550b58aed1496834d7a6ccb5627db9632dcc12cd7f4f8e52ed0a9238

Aliases

arxiv: astro-ph/0301602 · arxiv_version: astro-ph/0301602v1 · doi: 10.48550/arxiv.astro-ph/0301602 · pith_short_12: 3G57KXKVBNMK · pith_short_16: 3G57KXKVBNMK5UKJ · pith_short_8: 3G57KXKV

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/3G57KXKVBNMK5UKJNA2NPJWMWV \
  | 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: d9bbf55d550b58aed1496834d7a6ccb5627db9632dcc12cd7f4f8e52ed0a9238

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9523e2d7a9a7b8ba08914bd0fb36575c9de4893fbc6a677200f5f940604bb036",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-01-30T09:50:15Z",
    "title_canon_sha256": "63848004d7211632c275d7f1f41b3887e5aa7b4075897e54373236faff88a1c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0301602",
    "kind": "arxiv",
    "version": 1
  }
}