Pith Number

pith:AFD7EOY4

pith:2017:AFD7EOY4JMYRIBPUDBYLTZQEZ6

not attested not anchored not stored refs pending

Gamma-Ray Emission from Arp 220: Indications of an Active Galactic Nucleus

Eskil Varenius, John S. Gallagher III, Susanne Aalto, Tova M. Yoast-Hull

arxiv:1704.03791 v1 · 2017-04-12 · astro-ph.HE · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AFD7EOY4JMYRIBPUDBYLTZQEZ6}

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	2026-05-18T00:43:25.671897Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0147f23b1c4b311405f41870b9e604cf9b69b380284dfc10e9371f0e4f049313

Aliases

arxiv: 1704.03791 · arxiv_version: 1704.03791v1 · doi: 10.48550/arxiv.1704.03791 · pith_short_12: AFD7EOY4JMYR · pith_short_16: AFD7EOY4JMYRIBPU · pith_short_8: AFD7EOY4

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/AFD7EOY4JMYRIBPUDBYLTZQEZ6 \
  | 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: 0147f23b1c4b311405f41870b9e604cf9b69b380284dfc10e9371f0e4f049313

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0026ca5c8d6a828d1d955689bea6cae5854772280cf90633ad2a623800bd4d45",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2017-04-12T15:09:45Z",
    "title_canon_sha256": "2c958afed4a893447f2adab3caee65f5e7ccb854de9804b9b4af5aeff36edd08"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.03791",
    "kind": "arxiv",
    "version": 1
  }
}