Pith Number

pith:7JKKNKEG

pith:2019:7JKKNKEGJAPUQMUPPZ5LKQNA4X

not attested not anchored not stored refs pending

M87 black hole mass and spin estimate through the position of the jet boundary shape break

E.E. Nokhrina, K. Asada, K. Hada, L.I. Gurvits, M. Nakamura, V.S. Beskin

arxiv:1904.05665 v2 · 2019-04-11 · 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{7JKKNKEGJAPUQMUPPZ5LKQNA4X}

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.

Cited by

1 paper in Pith

Testing the Schwarzschild metric in a strong field region with the Event Horizon Telescope

Receipt and verification

First computed	2026-07-04T23:51:41.521123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa54a6a886481f48328f7e7ab541a0e5e7a08554a8bc03430e0f4a6ea23d4c0c

Aliases

arxiv: 1904.05665 · arxiv_version: 1904.05665v2 · doi: 10.48550/arxiv.1904.05665 · pith_short_12: 7JKKNKEGJAPU · pith_short_16: 7JKKNKEGJAPUQMUP · pith_short_8: 7JKKNKEG

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/7JKKNKEGJAPUQMUPPZ5LKQNA4X \
  | 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: fa54a6a886481f48328f7e7ab541a0e5e7a08554a8bc03430e0f4a6ea23d4c0c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5096e47656d88f89c61697c012ea350d8dba6300df7f59a9ec47ae048c8fee9b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-04-11T12:41:14Z",
    "title_canon_sha256": "6759cf080f2544b16fac9718df4ea8fe951cb18e5579cf37f1ad67c811ea3946"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.05665",
    "kind": "arxiv",
    "version": 2
  }
}