Pith Number

pith:XLWDSC7V

pith:2011:XLWDSC7VGOR26AUHVVBZAQZYEO

not attested not anchored not stored refs pending

Ultra-soft sources as supernova type Ia progenitors

Kelly Lepo, Marten van Kerkwijk

arxiv:1109.4394 v1 · 2011-09-20 · 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{XLWDSC7VGOR26AUHVVBZAQZYEO}

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	2026-05-18T04:12:43.359285Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

baec390bf533a3af0287ad4390433823bfeb476957fab5ce278b7d73d9d27750

Aliases

arxiv: 1109.4394 · arxiv_version: 1109.4394v1 · doi: 10.48550/arxiv.1109.4394 · pith_short_12: XLWDSC7VGOR2 · pith_short_16: XLWDSC7VGOR26AUH · pith_short_8: XLWDSC7V

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/XLWDSC7VGOR26AUHVVBZAQZYEO \
  | 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: baec390bf533a3af0287ad4390433823bfeb476957fab5ce278b7d73d9d27750

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37fb8694e05eee315a354fa2895abe0823d278aed0393f93dd1b1849401f22fe",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2011-09-20T19:00:21Z",
    "title_canon_sha256": "2d70ec253fa37292a709cdfb278e60a9c18f0815521aa2302fa08084b86c5712"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.4394",
    "kind": "arxiv",
    "version": 1
  }
}