Pith Number

pith:QCNW7QAS

pith:2004:QCNW7QASIMXJU77ULDMH4TKUCM

not attested not anchored not stored refs pending

What drives the Balmer extinction sequence in spiral galaxies? Clues from the Sloan Digital Sky Survey

A. Mateus Jr., G. Stasinska, L. Sodre Jr., R. Szczerba

arxiv:astro-ph/0403531 v1 · 2004-03-22 · 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{QCNW7QASIMXJU77ULDMH4TKUCM}

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	2026-07-04T16:43:27.205536Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

809b6fc012432e9a7ff458d87e4d54133c44e42080aa0f1abc6752c556b4b978

Aliases

arxiv: astro-ph/0403531 · arxiv_version: astro-ph/0403531v1 · doi: 10.48550/arxiv.astro-ph/0403531 · pith_short_12: QCNW7QASIMXJ · pith_short_16: QCNW7QASIMXJU77U · pith_short_8: QCNW7QAS

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/QCNW7QASIMXJU77ULDMH4TKUCM \
  | 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: 809b6fc012432e9a7ff458d87e4d54133c44e42080aa0f1abc6752c556b4b978

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fab50f986e9a8a15af702103f353a01d68120885332c350c9b4ad94204bb052a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-03-22T19:51:56Z",
    "title_canon_sha256": "b152b5d76c55d6e33b8a8a05653d72df11a0a96989a2b808b502d8b8fab06aed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0403531",
    "kind": "arxiv",
    "version": 1
  }
}