Pith Number

pith:ZMMPWLR4

pith:1999:ZMMPWLR4PGHCQTKLPYFXCCBIKC

not attested not anchored not stored refs pending

Unmasking the tail of the cosmic ray spectrum

J. D. Swain, L. A. Anchordoqui, M. T. Dova, S. Reucroft, T. P. McCauley

arxiv:astro-ph/9912081 v2 · 1999-12-03 · 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{ZMMPWLR4PGHCQTKLPYFXCCBIKC}

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	2026-05-18T02:40:27.417654Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cb18fb2e3c798e284d4b7e0b71082850a4e6bcfcb88f712581bccbe84ef35d07

Aliases

arxiv: astro-ph/9912081 · arxiv_version: astro-ph/9912081v2 · doi: 10.48550/arxiv.astro-ph/9912081 · pith_short_12: ZMMPWLR4PGHC · pith_short_16: ZMMPWLR4PGHCQTKL · pith_short_8: ZMMPWLR4

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/ZMMPWLR4PGHCQTKLPYFXCCBIKC \
  | 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: cb18fb2e3c798e284d4b7e0b71082850a4e6bcfcb88f712581bccbe84ef35d07

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c7b63983074ad0044846e9661cd04fb6682c61c1538e659d10653d742e5cfdb1",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-12-03T23:36:48Z",
    "title_canon_sha256": "fe4d48cf4d00480b3eeee85c314647f4c0fe6298ea47b39e0c25cc4160b44ddd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9912081",
    "kind": "arxiv",
    "version": 2
  }
}