Pith Number

pith:ALOTYFTE

pith:2019:ALOTYFTEDM2WMDA3BTIHJU23M7

not attested not anchored not stored refs pending

Measurement of the spin of the M87 black hole from its observed twisted light

Bo Thid\'e, Fabrizio Tamburini, Massimo Della Valle

arxiv:1904.07923 v4 · 2019-04-16 · astro-ph.HE · gr-qc

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ALOTYFTEDM2WMDA3BTIHJU23M7}

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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.

Cited by

4 papers in Pith

Constraining Kerr supermassive black hole properties using gravitational waves from inspiraling stellar-mass binary black holes

Dimming of Photon Ring due to Photon-Axion Conversion around Kerr Black Holes

Constraining interacting dark energy models with black hole superradiance

Investigating the interplay of the braneworld gravity and the plasma environment on the black hole shadow

Receipt and verification

First computed	2026-07-05T00:30:04.751449Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

02dd3c16641b35660c1b0cd074d35b67c7274312a0f32811a8db248ec7fcb8bf

Aliases

arxiv: 1904.07923 · arxiv_version: 1904.07923v4 · doi: 10.48550/arxiv.1904.07923 · pith_short_12: ALOTYFTEDM2W · pith_short_16: ALOTYFTEDM2WMDA3 · pith_short_8: ALOTYFTE

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/ALOTYFTEDM2WMDA3BTIHJU23M7 \
  | 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: 02dd3c16641b35660c1b0cd074d35b67c7274312a0f32811a8db248ec7fcb8bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9f6e3e644a28a0367d9b0c8ffd804450e35c0cbd86af8e29880c948a007ed2e3",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-04-16T18:56:19Z",
    "title_canon_sha256": "cbc117660686ef8a87ed7dde48cec6262b9c8f35b708538423ac957e01ff0bb7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.07923",
    "kind": "arxiv",
    "version": 4
  }
}