Pith Number

pith:637WNN56

pith:2019:637WNN56XDGAYBCUS4CIOEXPOE

not attested not anchored not stored refs pending

X-ray analysis of the accreting supermassive black hole in the radio galaxy PKS 2251+11

Fausto Vagnetti, Francesca Panessa, Francesco Tombesi, Gabriele Bruni, Samuele Ronchini

arxiv:1903.06611 v2 · 2019-03-15 · 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{637WNN56XDGAYBCUS4CIOEXPOE}

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	2026-05-17T23:40:23.612781Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f6ff66b7beb8cc0c045497048712ef713bc0eeb90aaf560e52162b87d2e33442

Aliases

arxiv: 1903.06611 · arxiv_version: 1903.06611v2 · doi: 10.48550/arxiv.1903.06611 · pith_short_12: 637WNN56XDGA · pith_short_16: 637WNN56XDGAYBCU · pith_short_8: 637WNN56

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/637WNN56XDGAYBCUS4CIOEXPOE \
  | 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: f6ff66b7beb8cc0c045497048712ef713bc0eeb90aaf560e52162b87d2e33442

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8b5b4aba490edc8f57bb016f9a61e106fcd947bd59ee87e124e35afb64e965e5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-03-15T15:49:49Z",
    "title_canon_sha256": "cc34c8074a1b58d3c57e0e46aab7ef330284a0ffc4b29eeae721c3f9b38c1cb3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.06611",
    "kind": "arxiv",
    "version": 2
  }
}