Pith Number

pith:QMQZ5E3H

pith:2002:QMQZ5E3HMCBI5DBCNIWEPD6UGN

not attested not anchored not stored refs pending

Ground level muons in coincidence with the solar flare of April 15, 2001

C. D'Andrea, J. Poirier

arxiv:astro-ph/0211490 v1 · 2002-11-21 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QMQZ5E3HMCBI5DBCNIWEPD6UGN}

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	2026-05-18T02:19:26.318333Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83219e936760828e8c226a2c478fd43364f6febf38d957e81c13a35792233ae0

Aliases

arxiv: astro-ph/0211490 · arxiv_version: astro-ph/0211490v1 · doi: 10.48550/arxiv.astro-ph/0211490 · pith_short_12: QMQZ5E3HMCBI · pith_short_16: QMQZ5E3HMCBI5DBC · pith_short_8: QMQZ5E3H

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/QMQZ5E3HMCBI5DBCNIWEPD6UGN \
  | 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: 83219e936760828e8c226a2c478fd43364f6febf38d957e81c13a35792233ae0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "631631b107f304f19e538c064d0efeb8c1d89585f8d03fd4b9e1c4885f9077fa",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2002-11-21T22:15:36Z",
    "title_canon_sha256": "05c0663fee8d1f0f6710d7b40956cb03cee29dd276d71e5fab48a21755924e8a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0211490",
    "kind": "arxiv",
    "version": 1
  }
}