Pith Number

pith:HF77F5ZQ

pith:2019:HF77F5ZQI77UW7UONMGCSCZYVJ

not attested not anchored not stored refs pending

The Unique Blazar OJ 287 and its Massive Binary Black Hole Central Engine

Abhimanyu Susobhanan, Achamveedu Gopakumar, Andrei Berdyugin, Helen Jermak, Kari Nilsson, Lankeswar Dey, Mark Kidger, Mauri Valtonen, Pauli Pihajoki, Rene Hudec, Stanislaw Zola, Stefanie Komossa, Stefano Ciprini, Tapio Pursimo, Vilppu Piirola

arxiv:1905.02689 v1 · 2019-05-07 · astro-ph.GA · astro-ph.HE · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HF77F5ZQI77UW7UONMGCSCZYVJ}

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.

Cited by

1 paper in Pith

Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves

Receipt and verification

First computed	2026-05-17T23:46:50.711230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

397ff2f73047ff4b7e8e6b0c290b38aa4ff7366e857d747c13054dc3ebac457b

Aliases

arxiv: 1905.02689 · arxiv_version: 1905.02689v1 · doi: 10.48550/arxiv.1905.02689 · pith_short_12: HF77F5ZQI77U · pith_short_16: HF77F5ZQI77UW7UO · pith_short_8: HF77F5ZQ

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/HF77F5ZQI77UW7UONMGCSCZYVJ \
  | 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: 397ff2f73047ff4b7e8e6b0c290b38aa4ff7366e857d747c13054dc3ebac457b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f7046d5bd8b9f867936c2fe8ead7b67ee2ca002d7df3a56aa4e265b5c6d1ed3",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-05-07T16:49:46Z",
    "title_canon_sha256": "3621e062359b1e9149e2cf3968dc84135b48f970693a4956445af93c23e418cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.02689",
    "kind": "arxiv",
    "version": 1
  }
}