Pith Number

pith:Q3PT2KOU

pith:2000:Q3PT2KOU6HMXNPYHAGJXHEJ36N

not attested not anchored not stored refs pending

Preliminary Spectral Analysis of the Type II Supernova 1999em

Alexei V. Filippenko, Brian Schmidt, Bruno Leibundgut, Claes Fransson, C. S. J. Pun, David Branch, E. Baron, E. Michael, George Sonneborn, J. C. Wheeler, L. Wang, M. M. Phillips, N. B. Suntzeff, Nino Panagia, Peter Garnavich, Peter H. Hauschildt, Peter Lundqvist, P. M. Challis, R. Chevalier, R. McCray, R. P. Kirshner, S. Jha

arxiv:astro-ph/0010614 v1 · 2000-10-30 · 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{Q3PT2KOU6HMXNPYHAGJXHEJ36N}

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	2026-05-18T02:40:36.618923Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86df3d29d4f1d976bf07019373913bf3716b918adf1dc7e8a95ccdf31a4e46c1

Aliases

arxiv: astro-ph/0010614 · arxiv_version: astro-ph/0010614v1 · doi: 10.48550/arxiv.astro-ph/0010614 · pith_short_12: Q3PT2KOU6HMX · pith_short_16: Q3PT2KOU6HMXNPYH · pith_short_8: Q3PT2KOU

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/Q3PT2KOU6HMXNPYHAGJXHEJ36N \
  | 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: 86df3d29d4f1d976bf07019373913bf3716b918adf1dc7e8a95ccdf31a4e46c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0fe5a2c970d8b48ba63de58aacacd6dfd7102a5023fd6915f9cecff04496c0d8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-10-30T17:06:35Z",
    "title_canon_sha256": "d3793d5c55af9ca80314719e7fa2bf1b7dace2a9a2a2fe3005e446f27e2f8bc5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0010614",
    "kind": "arxiv",
    "version": 1
  }
}