Pith Number

pith:CPCLM7IC

pith:2019:CPCLM7IC4BHCB3G3R4B3TZJ4JL

not attested not anchored not stored refs pending

Black hole Spin Measurement Based on Time-domain VLBI Observations of Infalling Gas Cloud

Kazunori Akiyama, Kotaro Moriyama, Mareki Honma, Shin Mineshige

arxiv:1910.10713 v1 · 2019-10-23 · 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{CPCLM7IC4BHCB3G3R4B3TZJ4JL}

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	2026-07-05T00:32:02.695251Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

13c4b67d02e04e20ecdb8f03b9e53c4ad1a42f26839b869014b327e6167c5038

Aliases

arxiv: 1910.10713 · arxiv_version: 1910.10713v1 · doi: 10.48550/arxiv.1910.10713 · pith_short_12: CPCLM7IC4BHC · pith_short_16: CPCLM7IC4BHCB3G3 · pith_short_8: CPCLM7IC

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/CPCLM7IC4BHCB3G3R4B3TZJ4JL \
  | 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: 13c4b67d02e04e20ecdb8f03b9e53c4ad1a42f26839b869014b327e6167c5038

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "16a195fe7f37d0e149528dcbdd127c334f191527d3da52a94a625b8fbda8a3c8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-10-23T18:00:00Z",
    "title_canon_sha256": "fb9af9219e69b2c657c63b632bd95f1b451046c0f965c52f89e2fd82c6680f62"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1910.10713",
    "kind": "arxiv",
    "version": 1
  }
}