Pith Number

pith:JZVDNWI5

pith:2003:JZVDNWI5RDZOLNHX46JZFMKS2B

not attested not anchored not stored refs pending

Did a gamma-ray burst initiate the late Ordovician mass extinction?

A. Melott, B. Lieberman, & B. Thomas (University of Kansas), & C. Jackman (NASA-Goddard), C. Laird, J. Cannizzo, L. Martin, M. Medvedev, N. Gehrels

arxiv:astro-ph/0309415 v3 · 2003-09-15 · astro-ph · physics.ao-ph · physics.bio-ph · 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{JZVDNWI5RDZOLNHX46JZFMKS2B}

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.

Cited by

1 paper in Pith

Upper limit on the fraction of alien civilizations that develop communication technology

Receipt and verification

First computed	2026-07-04T16:51:39.620531Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4e6a36d91d88f2e5b4f7e79392b152d0667fe4e3f03c9206061f4d77f5dd158b

Aliases

arxiv: astro-ph/0309415 · arxiv_version: astro-ph/0309415v3 · doi: 10.48550/arxiv.astro-ph/0309415 · pith_short_12: JZVDNWI5RDZO · pith_short_16: JZVDNWI5RDZOLNHX · pith_short_8: JZVDNWI5

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/JZVDNWI5RDZOLNHX46JZFMKS2B \
  | 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: 4e6a36d91d88f2e5b4f7e79392b152d0667fe4e3f03c9206061f4d77f5dd158b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b1840b39ce432744f68b87de6e1684f15ca63f0ce331c9a11ccce33643653015",
    "cross_cats_sorted": [
      "physics.ao-ph",
      "physics.bio-ph",
      "physics.geo-ph",
      "q-bio.PE"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-09-15T20:42:47Z",
    "title_canon_sha256": "453f775eb706bccd51798eefe52eb6c3fcb74242b86bf6563b2c97f9be75cc75"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0309415",
    "kind": "arxiv",
    "version": 3
  }
}