Pith Number

pith:HPE6KFCK

pith:2021:HPE6KFCKPEIORO45PZTMS75VPL

not attested not anchored not stored refs pending

First direct dynamical detection of a dual supermassive black hole system at sub-kiloparsec separation

Anil C. Seth, Antoine Dumont, Bernd Husemann, Holger Baumgardt, Iskren Georgiev, Karina. T. Voggel, Michael Hilker, Nadine Neumayer, Renuka Pechetti, Steffen Mieske

arxiv:2111.14854 v1 · 2021-11-29 · 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{HPE6KFCKPEIORO45PZTMS75VPL}

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	2026-07-05T04:04:26.330059Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3bc9e5144a7910e8bb9d7e66c97fb57acd02e43b424caf2183d74067f90c0461

Aliases

arxiv: 2111.14854 · arxiv_version: 2111.14854v1 · doi: 10.48550/arxiv.2111.14854 · pith_short_12: HPE6KFCKPEIO · pith_short_16: HPE6KFCKPEIORO45 · pith_short_8: HPE6KFCK

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/HPE6KFCKPEIORO45PZTMS75VPL \
  | 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: 3bc9e5144a7910e8bb9d7e66c97fb57acd02e43b424caf2183d74067f90c0461

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "70a7fc60f20d210de54fa9d98039caa2dc73be4416597275740fb03704918036",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2021-11-29T19:00:00Z",
    "title_canon_sha256": "3fa9f3c6434436481a0b13aefe8aa5e061edd12a00b023443da0bf5b370a4bec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2111.14854",
    "kind": "arxiv",
    "version": 1
  }
}