Pith Number

pith:VD6KXSAO

pith:2020:VD6KXSAON7AKG5CKE223MTH7VR

not attested not anchored not stored refs pending

Spin of the M87 black hole

David Garofalo

arxiv:2003.02163 v1 · 2020-03-02 · 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{VD6KXSAON7AKG5CKE223MTH7VR}

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

Greybody Factor for massive scalar field in charged black hole

Receipt and verification

First computed	2026-07-05T01:04:17.545783Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8fcabc80e6fc0a3744a26b5b64cffac5fbbd79488dad4031923b7f5d9b2f712

Aliases

arxiv: 2003.02163 · arxiv_version: 2003.02163v1 · doi: 10.48550/arxiv.2003.02163 · pith_short_12: VD6KXSAON7AK · pith_short_16: VD6KXSAON7AKG5CK · pith_short_8: VD6KXSAO

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/VD6KXSAON7AKG5CKE223MTH7VR \
  | 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: a8fcabc80e6fc0a3744a26b5b64cffac5fbbd79488dad4031923b7f5d9b2f712

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3f7e7b8a188246c66f932eb11c9fb68262663a6f507b010f29745f5ceaa0d4e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2020-03-02T01:41:02Z",
    "title_canon_sha256": "76a14a182a020ef684a626bb5518233a23a5e560da235838d82a5b66852dd172"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2003.02163",
    "kind": "arxiv",
    "version": 1
  }
}