Pith Number

pith:HKZIXHUU

pith:2019:HKZIXHUUEFYFNBPKYYQAUC2FFL

not attested not anchored not stored refs pending

The Long-Lasting Activity in the Flat Spectrum Radio Quasar (FSRQ) CTA~102

Alicja Wierzcholska, Felix Jankowsky, Jean-Philippe Lenain, Markus B\"ottcher, Michael Zacharias, Stefan J. Wagner

arxiv:1902.11224 v1 · 2019-02-28 · 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{HKZIXHUUEFYFNBPKYYQAUC2FFL}

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	2026-05-17T23:52:25.202205Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ab28b9e9421705685eac6200a0b452af86a9c3ea86f1e7d23644c033c29e69e

Aliases

arxiv: 1902.11224 · arxiv_version: 1902.11224v1 · doi: 10.48550/arxiv.1902.11224 · pith_short_12: HKZIXHUUEFYF · pith_short_16: HKZIXHUUEFYFNBPK · pith_short_8: HKZIXHUU

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/HKZIXHUUEFYFNBPKYYQAUC2FFL \
  | 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: 3ab28b9e9421705685eac6200a0b452af86a9c3ea86f1e7d23644c033c29e69e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a02b2ba88e82f4e2a3f94731df96b81c2792e48cb6349eb46393e60a821e9f28",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-02-28T17:07:52Z",
    "title_canon_sha256": "beb6df4518460a55cde5bbf828fb5d2fb8f84d4fdad3ecb91ceef5669e27a4c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.11224",
    "kind": "arxiv",
    "version": 1
  }
}