Pith Number

pith:QBPB4ARI

pith:2025:QBPB4ARIX3MNHH7FPASOJZFLSM

not attested not anchored not stored refs pending

Constraining the Mass of a Hypothetical Secondary Black Hole in M87 with the NANOGrav 15-Year Data Set

Hyunwook Ro, Jongho Park, Kazuhiro Hada, Masahiro Nagashima, Motoki Kino, Yuzhu Cui

arxiv:2506.12313 v1 · 2025-06-14 · astro-ph.HE · astro-ph.GA · 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{QBPB4ARIX3MNHH7FPASOJZFLSM}

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	2026-07-05T11:21:51.151718Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

805e1e0228bed8d39fe57824e4e4ab931a3ec9c2307be697c319d3d6105a975c

Aliases

arxiv: 2506.12313 · arxiv_version: 2506.12313v1 · doi: 10.48550/arxiv.2506.12313 · pith_short_12: QBPB4ARIX3MN · pith_short_16: QBPB4ARIX3MNHH7F · pith_short_8: QBPB4ARI

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/QBPB4ARIX3MNHH7FPASOJZFLSM \
  | 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: 805e1e0228bed8d39fe57824e4e4ab931a3ec9c2307be697c319d3d6105a975c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c8a1dca9a7934609e8feb1e95cfa08341bbed4cc957777ac8cdb960acd0f319b",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "gr-qc"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2025-06-14T02:29:07Z",
    "title_canon_sha256": "b0400c6a6166aa23b73ff64c900f268cb058ccb255b430dcd4a77e6fd5327140"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2506.12313",
    "kind": "arxiv",
    "version": 1
  }
}