Pith Number

pith:KYYNWWPP

pith:2001:KYYNWWPP5TBFSYJBUI3TQPTIHA

not attested not anchored not stored refs pending

Cosmic Supernova Rate History and Type Ia Supernova Progenitors

Chiaki Kobayashi (1), Ken'ichi Nomoto (1), Takuji Tsujimoto (2) ((1) University of Tokyo (2) National Astronomical Observatory)

arxiv:astro-ph/0102247 v1 · 2001-02-14 · 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{KYYNWWPP5TBFSYJBUI3TQPTIHA}

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	2026-05-18T01:00:27.579489Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5630db59efecc2596121a237383e68382dfc960f6641596355d9b1238caddebe

Aliases

arxiv: astro-ph/0102247 · arxiv_version: astro-ph/0102247v1 · doi: 10.48550/arxiv.astro-ph/0102247 · pith_short_12: KYYNWWPP5TBF · pith_short_16: KYYNWWPP5TBFSYJB · pith_short_8: KYYNWWPP

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/KYYNWWPP5TBFSYJBUI3TQPTIHA \
  | 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: 5630db59efecc2596121a237383e68382dfc960f6641596355d9b1238caddebe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3d1ff657a0cd6d8f383f71eb81a2e0e3e8d571c883920e664123052d69c62c13",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-02-14T11:19:15Z",
    "title_canon_sha256": "a550f0d4ec469856432d1e5fd04a61819b30d5df0f4a9d876d41621a225b8750"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0102247",
    "kind": "arxiv",
    "version": 1
  }
}