Pith Number

pith:NCGK4XQ5

pith:2011:NCGK4XQ5NJCPPRFABNCEMHGCCK

not attested not anchored not stored refs pending

Electromagnetic counterparts of supermassive black hole binaries resolved by pulsar timing arrays

2), (2) Max Planck Institute for Astrophysics), Kristen Menou (1), Takamitsu Tanaka (1, Zolt\'an Haiman (1) ((1) Columbia University

arxiv:1107.2937 v3 · 2011-07-14 · astro-ph.CO · 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{NCGK4XQ5NJCPPRFABNCEMHGCCK}

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	2026-05-18T02:01:16.658558Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

688cae5e1d6a44f7c4a00b44461cc21298e27e2d05fc6175c777a9f8bc15b9da

Aliases

arxiv: 1107.2937 · arxiv_version: 1107.2937v3 · doi: 10.48550/arxiv.1107.2937 · pith_short_12: NCGK4XQ5NJCP · pith_short_16: NCGK4XQ5NJCPPRFA · pith_short_8: NCGK4XQ5

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/NCGK4XQ5NJCPPRFABNCEMHGCCK \
  | 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: 688cae5e1d6a44f7c4a00b44461cc21298e27e2d05fc6175c777a9f8bc15b9da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ad77384316c6e7d0cd297ddef340c25865a1aa842151dc0647c5657936a3d54",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-07-14T20:05:43Z",
    "title_canon_sha256": "c769d866d2ada80092c4f4590e40223c430b86c7af88c59f00ac949bb181f1ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.2937",
    "kind": "arxiv",
    "version": 3
  }
}