Pith Number

pith:KBFDYSML

pith:2013:KBFDYSMLLU3M546QAOSGNUKBQB

not attested not anchored not stored refs pending

Gamma-rays from Blazars and the Extragalactic Background Light

Luigi Costamante

arxiv:1309.0612 v1 · 2013-09-03 · astro-ph.HE · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KBFDYSMLLU3M546QAOSGNUKBQB}

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	2026-05-18T03:14:18.568664Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

504a3c498b5d36cef3d003a466d1418056e161f81cdadaf1e4478f8c40fd9e78

Aliases

arxiv: 1309.0612 · arxiv_version: 1309.0612v1 · doi: 10.48550/arxiv.1309.0612 · pith_short_12: KBFDYSMLLU3M · pith_short_16: KBFDYSMLLU3M546Q · pith_short_8: KBFDYSML

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/KBFDYSMLLU3M546QAOSGNUKBQB \
  | 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: 504a3c498b5d36cef3d003a466d1418056e161f81cdadaf1e4478f8c40fd9e78

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d4ff42c767b7660d2b08b5005ec11347e4a2de005cdbe938b94f3a79753c2151",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-09-03T08:33:20Z",
    "title_canon_sha256": "aa626aa70b55246619fb1a7bf2bb78a43b70abbe5f5dfc8e6e009ce74b4db5e9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.0612",
    "kind": "arxiv",
    "version": 1
  }
}