Pith Number

pith:EZWFKFUN

pith:2017:EZWFKFUNDK6R7CMVSYVNZ5TV5D

not attested not anchored not stored refs pending

A supernova at 50 pc: Effects on the Earth's atmosphere and biota

A. C. Overholt, A.L Melott (Kansas), B.C. Thomas, D.V. Semikoz, M. Kachelriess

arxiv:1702.04365 v2 · 2017-02-14 · astro-ph.EP · astro-ph.HE · astro-ph.SR · physics.geo-ph · q-bio.PE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EZWFKFUNDK6R7CMVSYVNZ5TV5D}

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	2026-05-18T00:44:38.545579Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

266c55168d1abd1f8995962adcf675e8e81f31fadede32420502a3073e1bc10f

Aliases

arxiv: 1702.04365 · arxiv_version: 1702.04365v2 · doi: 10.48550/arxiv.1702.04365 · pith_short_12: EZWFKFUNDK6R · pith_short_16: EZWFKFUNDK6R7CMV · pith_short_8: EZWFKFUN

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/EZWFKFUNDK6R7CMVSYVNZ5TV5D \
  | 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: 266c55168d1abd1f8995962adcf675e8e81f31fadede32420502a3073e1bc10f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f0687384b3d16df0170d31eed25c7cb77f847763a3be1d50f1caea3116740e6e",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "astro-ph.SR",
      "physics.geo-ph",
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2017-02-14T19:24:33Z",
    "title_canon_sha256": "4f02f0396207d434a40e3148857c0aa60fc6c67bb4aea78fe784c0c294050e0f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.04365",
    "kind": "arxiv",
    "version": 2
  }
}