Pith Number

pith:ROBKS32S

pith:2018:ROBKS32SDUVFBJMK74XSWUBMBT

not attested not anchored not stored refs pending

Testing the Kerr nature of the supermassive black hole in Ark 564

Ashutosh Tripathi, Askar B. Abdikamalov, Cosimo Bambi, Dimitry Ayzenberg, Jiachen Jiang, Sourabh Nampalliwar

arxiv:1804.10380 v2 · 2018-04-27 · gr-qc · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ROBKS32SDUVFBJMK74XSWUBMBT}

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	2026-05-18T00:09:41.522964Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8b82a96f521d2a50a58aff2f2b502c0cd976047e71dcc1229f81ffe388811f96

Aliases

arxiv: 1804.10380 · arxiv_version: 1804.10380v2 · doi: 10.48550/arxiv.1804.10380 · pith_short_12: ROBKS32SDUVF · pith_short_16: ROBKS32SDUVFBJMK · pith_short_8: ROBKS32S

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/ROBKS32SDUVFBJMK74XSWUBMBT \
  | 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: 8b82a96f521d2a50a58aff2f2b502c0cd976047e71dcc1229f81ffe388811f96

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ebefedc9b44af42f6bf1a2fcaf5d780e4415a07de2450c6cc89a8290f43c079c",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2018-04-27T08:15:36Z",
    "title_canon_sha256": "85e62c007b348e2e61fa91a9bf87d43322c4084b19c13f3a22117db38769d799"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.10380",
    "kind": "arxiv",
    "version": 2
  }
}