Pith Number

pith:ZQWXSEH7

pith:2019:ZQWXSEH7IB2ATYUDRQKJ6F6UE2

not attested not anchored not stored refs pending

An extremely X--ray weak blazar at z=5

A. Caccianiga, A. Moretti, C. Cicone, G. Ghisellini, L. Ighina, M. Pedani, S. Belladitta, T. Sbarrato

arxiv:1908.08552 v1 · 2019-08-22 · astro-ph.GA · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZQWXSEH7IB2ATYUDRQKJ6F6UE2}

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	2026-07-05T00:03:51.892958Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc2d7910ff407409e2838c149f17d426bc9bfe6b42f09124ac7918050e0d9906

Aliases

arxiv: 1908.08552 · arxiv_version: 1908.08552v1 · doi: 10.48550/arxiv.1908.08552 · pith_short_12: ZQWXSEH7IB2A · pith_short_16: ZQWXSEH7IB2ATYUD · pith_short_8: ZQWXSEH7

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/ZQWXSEH7IB2ATYUDRQKJ6F6UE2 \
  | 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: cc2d7910ff407409e2838c149f17d426bc9bfe6b42f09124ac7918050e0d9906

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "846ef01f3ff7440f81b331a154fd0aa7a7aa22b7bcd9d023bffa905387bb2424",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-08-22T18:09:37Z",
    "title_canon_sha256": "de7f219df8dd2906582528225f8fd83a56cce87a89af52e59d2c4f3cf2a951ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.08552",
    "kind": "arxiv",
    "version": 1
  }
}