Pith Number

pith:7K5IPWYW

pith:2001:7K5IPWYWAMILOKG6JLBHKDXS3S

not attested not anchored not stored refs pending

Optical Spectra of Supernovae

David Branch, David J. Jeffery, E. Baron

arxiv:astro-ph/0111573 v1 · 2001-11-30 · 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{7K5IPWYWAMILOKG6JLBHKDXS3S}

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	2026-07-04T14:11:40.318142Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

faba87db160310b728de4ac2750ef2dc9035614bcef0c2567b720f7289d8b7c8

Aliases

arxiv: astro-ph/0111573 · arxiv_version: astro-ph/0111573v1 · doi: 10.48550/arxiv.astro-ph/0111573 · pith_short_12: 7K5IPWYWAMIL · pith_short_16: 7K5IPWYWAMILOKG6 · pith_short_8: 7K5IPWYW

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/7K5IPWYWAMILOKG6JLBHKDXS3S \
  | 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: faba87db160310b728de4ac2750ef2dc9035614bcef0c2567b720f7289d8b7c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "87b03b3f62f1a1e456e82d5ac87ababaceb75610affcd896a9b6dc34a202568a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-11-30T19:57:31Z",
    "title_canon_sha256": "38a4fae977089495f96cdc3ee694b7ecf463688fd3c6ffa1a7b415745ac0522c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0111573",
    "kind": "arxiv",
    "version": 1
  }
}