Pith Number

pith:SW4DZFKN

pith:2013:SW4DZFKNK73LWTDPFZM3ECTHUU

not attested not anchored not stored refs pending

On the progenitor of the Type IIP SN 2013ej in M74

Alastair Bruce, Andy Lawrence, Avishay Gal-Yam, Cosimo Inserra, David R. Young, Fang Yuan, Justyn R. Maund, Morgan Fraser, Rubina Kotak, Stefano Benetti, Stefano Valenti, Stephen J. Smartt, Ting-Wan Chen

arxiv:1309.4268 v1 · 2013-09-17 · astro-ph.CO · 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{SW4DZFKNK73LWTDPFZM3ECTHUU}

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	2026-05-18T01:47:36.739066Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

95b83c954d57f6bb4c6f2e59b20a67a532daab724e68dfd1002df148c76ba6e2

Aliases

arxiv: 1309.4268 · arxiv_version: 1309.4268v1 · doi: 10.48550/arxiv.1309.4268 · pith_short_12: SW4DZFKNK73L · pith_short_16: SW4DZFKNK73LWTDP · pith_short_8: SW4DZFKN

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/SW4DZFKNK73LWTDPFZM3ECTHUU \
  | 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: 95b83c954d57f6bb4c6f2e59b20a67a532daab724e68dfd1002df148c76ba6e2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "258fac7cb0af8fde8177937f09c0a21c2dff322ef706503576912363b074065f",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-09-17T11:55:23Z",
    "title_canon_sha256": "8b16507c84c5f1c50b1af2de8b02ea470647545aa735d096dd3ad62babe984cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.4268",
    "kind": "arxiv",
    "version": 1
  }
}