Pith Number

pith:B4K3QYR4

pith:2013:B4K3QYR4VTZDZJY2CTIROGWGCB

not attested not anchored not stored refs pending

Fermi LAT detection of extraordinary variability in the gamma-ray emission of the blazar PKS 1510-089

A. Stamerra, F. Tavecchio, G. Bonnoli, G. Ghisellini, G. Tagliaferri, L. Foschini

arxiv:1304.2878 v2 · 2013-04-10 · 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{B4K3QYR4VTZDZJY2CTIROGWGCB}

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	2026-05-18T03:14:49.872232Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f15b8623cacf23ca71a14d1171ac61048e42e806f46436c1eb2f60cbdf4033b

Aliases

arxiv: 1304.2878 · arxiv_version: 1304.2878v2 · doi: 10.48550/arxiv.1304.2878 · pith_short_12: B4K3QYR4VTZD · pith_short_16: B4K3QYR4VTZDZJY2 · pith_short_8: B4K3QYR4

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/B4K3QYR4VTZDZJY2CTIROGWGCB \
  | 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: 0f15b8623cacf23ca71a14d1171ac61048e42e806f46436c1eb2f60cbdf4033b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "68441a7bb55b22bd1615add910109f8d0e39ba89ce1c5ca1ecb57ad458d736df",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2013-04-10T09:01:37Z",
    "title_canon_sha256": "39c4ea92572ab019e2275442e0b8642be815027b7b41fa7fc7e8b2a7fbeeeba8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.2878",
    "kind": "arxiv",
    "version": 2
  }
}