Pith Number

pith:LBOYJ4QR

pith:2000:LBOYJ4QR666PMFLIOKEJGFB7GH

not attested not anchored not stored refs pending

Is it Round? Spectropolarimetry of the Type II-P Supernova 1999em

Alexei V. Filippenko, David R. Ardila, Douglas C. Leonard, Michael S. Brotherton

arxiv:astro-ph/0009285 v2 · 2000-09-18 · 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{LBOYJ4QR666PMFLIOKEJGFB7GH}

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	2026-07-04T16:17:10.353670Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

585d84f211f7bcf61568728893143f31d4df164edd1811d428bb8b627e29b78b

Aliases

arxiv: astro-ph/0009285 · arxiv_version: astro-ph/0009285v2 · doi: 10.48550/arxiv.astro-ph/0009285 · pith_short_12: LBOYJ4QR666P · pith_short_16: LBOYJ4QR666PMFLI · pith_short_8: LBOYJ4QR

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/LBOYJ4QR666PMFLIOKEJGFB7GH \
  | 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: 585d84f211f7bcf61568728893143f31d4df164edd1811d428bb8b627e29b78b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25410369c8da63940bd11007a4b35726b801d56f261518ab8ef3b83606e6d6e2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-09-18T23:46:36Z",
    "title_canon_sha256": "4597c89486f033bba36e41dc1c095ecc389e107fb537a2a0949b58858f1fff71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0009285",
    "kind": "arxiv",
    "version": 2
  }
}