Pith Number

pith:KLOSR7FC

pith:2009:KLOSR7FCZ6TFUWUE5LENBKNE3Y

not attested not anchored not stored refs pending

Measuring spin of a supermassive black hole at the Galactic centre -- Implications for a unique spin

H. Negoro, M. Miyoshi, R. Matsumoto, R. Takahashi, Y. Kato

arxiv:0906.5423 v2 · 2009-06-30 · astro-ph.GA · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KLOSR7FCZ6TFUWUE5LENBKNE3Y}

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	2026-05-18T02:13:11.872111Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

52dd28fca2cfa65a5a84eac8d0a9a4de06e883887c7f669f14e75dc5fc67727b

Aliases

arxiv: 0906.5423 · arxiv_version: 0906.5423v2 · doi: 10.48550/arxiv.0906.5423 · pith_short_12: KLOSR7FCZ6TF · pith_short_16: KLOSR7FCZ6TFUWUE · pith_short_8: KLOSR7FC

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/KLOSR7FCZ6TFUWUE5LENBKNE3Y \
  | 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: 52dd28fca2cfa65a5a84eac8d0a9a4de06e883887c7f669f14e75dc5fc67727b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "074af3f9d1dbe2d72115364042e0efd697308f1efb3ad25e3343c3e06fa1cbef",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-06-30T07:24:41Z",
    "title_canon_sha256": "265183cf1e762a67ff1d9406d5cbd0206544aab75cf398910dd6164847f4f741"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.5423",
    "kind": "arxiv",
    "version": 2
  }
}