Pith Number

pith:QSIQWDNU

pith:2013:QSIQWDNUQOOXT2BSZVDRC6YBSJ

not attested not anchored not stored refs pending

The Biggest Explosions in the Universe. II

Alexander Heger, Chris L. Fryer, Daniel J. Whalen, Jarrett L. Johnson, Joseph Smidt, Wesley Even

arxiv:1308.3278 v2 · 2013-08-15 · 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{QSIQWDNUQOOXT2BSZVDRC6YBSJ}

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	2026-05-18T01:48:15.355447Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84910b0db4839d79e832cd47117b01927c8e8ed3e82b6fff17720f52ace1afc5

Aliases

arxiv: 1308.3278 · arxiv_version: 1308.3278v2 · doi: 10.48550/arxiv.1308.3278 · pith_short_12: QSIQWDNUQOOX · pith_short_16: QSIQWDNUQOOXT2BS · pith_short_8: QSIQWDNU

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/QSIQWDNUQOOXT2BSZVDRC6YBSJ \
  | 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: 84910b0db4839d79e832cd47117b01927c8e8ed3e82b6fff17720f52ace1afc5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f396b50e2f9a500418f4da16720b1343175d4f9302aaf76407b0826c0bf0746",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-08-15T00:03:00Z",
    "title_canon_sha256": "800816f33f825ef5ea3c2a5f50109cfed2daa9008b2902b09cb6df1d7bde3b50"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.3278",
    "kind": "arxiv",
    "version": 2
  }
}