Pith Number

pith:NPC5FCFD

pith:2019:NPC5FCFD2XH4WJBMN3S7BIHPCD

not attested not anchored not stored refs pending

First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole

The Event Horizon Telescope Collaboration

arxiv:1906.11243 v1 · 2019-06-26 · astro-ph.GA · astro-ph.HE · gr-qc

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

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

25 papers in Pith

Topological charge and black hole photon spheres in massive gravity

Redshifted civilizations, galactic empires, and the Fermi paradox

Constraining interacting dark energy models with black hole superradiance

Observational Signatures of Rotating Ay\'{o}n-Beato-Garc\'{i}a Black Holes: Shadows, Accretion Disks and Images

Cosmological coupled black holes immersed in dark sector

Receipt and verification

First computed	2026-05-17T23:41:24.264519Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bc5d288a3d5cfcb242c6ee5f0a0ef10ca1bc42a7544673a8be5b92efcd1142c

Aliases

arxiv: 1906.11243 · arxiv_version: 1906.11243v1 · doi: 10.48550/arxiv.1906.11243 · pith_short_12: NPC5FCFD2XH4 · pith_short_16: NPC5FCFD2XH4WJBM · pith_short_8: NPC5FCFD

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/NPC5FCFD2XH4WJBMN3S7BIHPCD \
  | 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: 6bc5d288a3d5cfcb242c6ee5f0a0ef10ca1bc42a7544673a8be5b92efcd1142c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3384af3435facd764c9bb73342626e9c701477d12916437422677e5273671318",
    "cross_cats_sorted": [
      "astro-ph.HE",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2019-06-26T18:06:51Z",
    "title_canon_sha256": "0c337d247b9fc4990abfd0b2268a6e6caf8c75dd42a1dd747dc253cf7e968606"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.11243",
    "kind": "arxiv",
    "version": 1
  }
}