Pith Number

pith:HHVL6SJ5

pith:2011:HHVL6SJ5IB3H4SWD37BLS5ILQL

not attested not anchored not stored refs pending

The Massive Progenitor of the Possible Type II-Linear Supernova 2009hd in Messier 66

10), (10) CSIC, (11) IfA/Hawaii, 12) ((1) Spitzer Science Center/Caltech, (12) University of Arizona), 2, (2) UC Berkeley, 3), (3) ICE (IEEC-CSIC), (4) CfA, 5), (5) Clay Fellow, (6) Tuorla Observatory, 7), (7) NOT, (8) Rutgers University, (9) IAC, Alexei V. Filippenko (2), Edo Berger (4), Erkki Kankare (6, Jean-Charles Cuillandre (11), Jeffrey M. Silverman (2), John E. Beckman (9, Jon C. Mauerhan (1), Mohan Ganeshalingam (2), Nancy Elias-Rosa (1, Nathan Smith (2, Ryan J. Foley (4, Saurabh Jha (8), Schuyler D. Van Dyk (1), Weidong Li (2)

arxiv:1108.2645 v1 · 2011-08-12 · 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{HHVL6SJ5IB3H4SWD37BLS5ILQL}

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	2026-05-18T02:00:54.675189Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

39eabf493d40767e4ac3dfc2b9750b82ea3f73b95832956f0e1b3a9b2fc6c53d

Aliases

arxiv: 1108.2645 · arxiv_version: 1108.2645v1 · doi: 10.48550/arxiv.1108.2645 · pith_short_12: HHVL6SJ5IB3H · pith_short_16: HHVL6SJ5IB3H4SWD · pith_short_8: HHVL6SJ5

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/HHVL6SJ5IB3H4SWD37BLS5ILQL \
  | 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: 39eabf493d40767e4ac3dfc2b9750b82ea3f73b95832956f0e1b3a9b2fc6c53d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "afa8c98ab291653fd6eb2bdfb4cf3ba9c46108d3624c887c4a724aedfdbf8dff",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-08-12T15:34:34Z",
    "title_canon_sha256": "b835f8c67b7bae109b1a7bbf519d3da262939d1ca99bd8cedd5d93527dee1dc6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.2645",
    "kind": "arxiv",
    "version": 1
  }
}