Pith Number

pith:JR7SB2DY

pith:2005:JR7SB2DYFDQ5JKD5IEQUOOERQV

not attested not anchored not stored refs pending

Photon air showers at ultra-high energy and the photonuclear cross-section

B. Wilczynska, D. Gora, D. Heck, H. Wilczynski, J.Pekala, M. Risse, P. Homola, R. Engel

arxiv:astro-ph/0512434 v1 · 2005-12-16 · astro-ph · hep-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{JR7SB2DYFDQ5JKD5IEQUOOERQV}

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	2026-05-18T01:40:32.893374Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c7f20e87828e1d4a87d4121473891857232adbc66821046f870d82328307c1a

Aliases

arxiv: astro-ph/0512434 · arxiv_version: astro-ph/0512434v1 · doi: 10.48550/arxiv.astro-ph/0512434 · pith_short_12: JR7SB2DYFDQ5 · pith_short_16: JR7SB2DYFDQ5JKD5 · pith_short_8: JR7SB2DY

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/JR7SB2DYFDQ5JKD5IEQUOOERQV \
  | 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: 4c7f20e87828e1d4a87d4121473891857232adbc66821046f870d82328307c1a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d98c42f4a2f2de86b911ca3d16110b9cdc9e1b0b7e49846d884cb7dc73db554",
    "cross_cats_sorted": [
      "hep-ph"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-12-16T10:56:18Z",
    "title_canon_sha256": "01a9d031562265dc8d45212985004fa60a52df2e3a0276ed2950aec92fce8130"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0512434",
    "kind": "arxiv",
    "version": 1
  }
}