Pith Number

pith:4OIHC7KY

pith:2009:4OIHC7KYIUQ2IS7JMRRUBUKZA2

not attested not anchored not stored refs pending

The Massive Progenitor of the Type II-Linear SN 2009kr

(2) UC Berkeley, (3) Caltech, (4) U. Szeged (5) U. Texas, 5), (6) CFHT corporation, (7) CfA, 8) ((1) Spitzer Science Center, (8) Clay Fellow), A. A. Miller (2), A. F. Boden (3), A. V. Filippenko (2), Caltech, C. V. Griffith (2), I. K. W. Kleiserand (2), J.-C. Cuillandre (6), J. M. Silverman (2), J. S. Bloom (2), J. Vinko (4, M. Ganeshalingam (2), M. M. Kasliwal (3), N. Elias-Rosa (1), R. J. Foley (7, S. D. Van Dyk (1), T. N. Steele (2), W. Li (2)

arxiv:0912.2880 v3 · 2009-12-15 · astro-ph.SR

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4OIHC7KYIUQ2IS7JMRRUBUKZA2}

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	2026-05-18T02:33:56.466256Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e390717d584521a44be9646340d159068786baa8a5478dae8f3c53dad835b884

Aliases

arxiv: 0912.2880 · arxiv_version: 0912.2880v3 · doi: 10.48550/arxiv.0912.2880 · pith_short_12: 4OIHC7KYIUQ2 · pith_short_16: 4OIHC7KYIUQ2IS7J · pith_short_8: 4OIHC7KY

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/4OIHC7KYIUQ2IS7JMRRUBUKZA2 \
  | 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: e390717d584521a44be9646340d159068786baa8a5478dae8f3c53dad835b884

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "775418a2d4cba0dfa386afe8b24147cbf97e81529a51d58a56422a32b59df04c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2009-12-15T20:52:42Z",
    "title_canon_sha256": "dfeedbb15da85abe1229840d0004f6ff588c206546821c76eef615b68ffee7c2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2880",
    "kind": "arxiv",
    "version": 3
  }
}