Pith Number

pith:TQZOVSCT

pith:2010:TQZOVSCTQ2NOE4UZ7WB3MRLDX3

not attested not anchored not stored refs pending

The Disappearance of the Red Supergiant Progenitor of Supernova 2008bk

Justyn Maund, Mattias Ergon, Seppo Mattila, Stefano Benetti, Stephen Smartt

arxiv:1011.5494 v2 · 2010-11-24 · astro-ph.SR · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TQZOVSCTQ2NOE4UZ7WB3MRLDX3}

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	2026-05-18T03:11:09.932215Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9c32eac853869ae27299fd83b64563bee2e21942fad10c886d5f9e8a105403bf

Aliases

arxiv: 1011.5494 · arxiv_version: 1011.5494v2 · doi: 10.48550/arxiv.1011.5494 · pith_short_12: TQZOVSCTQ2NO · pith_short_16: TQZOVSCTQ2NOE4UZ · pith_short_8: TQZOVSCT

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/TQZOVSCTQ2NOE4UZ7WB3MRLDX3 \
  | 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: 9c32eac853869ae27299fd83b64563bee2e21942fad10c886d5f9e8a105403bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d374b89f8f22122fe5f4450fd02418dd3fe10796e75f57d13c07aaddbc61f499",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2010-11-24T20:44:10Z",
    "title_canon_sha256": "a1f9f50d4f100d61fcc691f669e77fe8d983bc8c021d2a30976db367104ffc92"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.5494",
    "kind": "arxiv",
    "version": 2
  }
}