Pith Number

pith:CTRXXL4F

pith:2012:CTRXXL4F4JJFTV2QZD2AULOQMN

not attested not anchored not stored refs pending

The First Spectroscopically Resolved Sub-parsec Orbit of a Supermassive Binary Black Hole

A. I. Shapovalova, D. Borka, E. Bon, J. Sulentic, L. \v{C}. Popovi\'c, N. Bon, P. Jovanovi\'c, P. Marziani, V. Borka Jovanovi\'c

arxiv:1209.4524 v2 · 2012-09-20 · astro-ph.HE · astro-ph.CO · 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{CTRXXL4F4JJFTV2QZD2AULOQMN}

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	2026-05-18T03:42:10.973361Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

14e37baf85e25259d750c8f40a2dd0637adc1a175a66269b3e25a95ca3de0bca

Aliases

arxiv: 1209.4524 · arxiv_version: 1209.4524v2 · doi: 10.48550/arxiv.1209.4524 · pith_short_12: CTRXXL4F4JJF · pith_short_16: CTRXXL4F4JJFTV2Q · pith_short_8: CTRXXL4F

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/CTRXXL4F4JJFTV2QZD2AULOQMN \
  | 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: 14e37baf85e25259d750c8f40a2dd0637adc1a175a66269b3e25a95ca3de0bca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90c7134e2a994d0327878bf3347436650ab6123cf09a460b56e6b03b9438356b",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-09-20T13:22:24Z",
    "title_canon_sha256": "f66eaf8ad14e333f9be60c401013a5570b4b5cc0e00265114893e1b6cef5ff70"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1209.4524",
    "kind": "arxiv",
    "version": 2
  }
}