Pith Number

pith:36AZRQZ7

pith:2019:36AZRQZ7EPDNGCWVHY7FIDBJUK

not attested not anchored not stored refs pending

Black Hole Spin Signature in the Black Hole Shadow of M87 in the Flaring State

Kazunori Akiyama, Motoki Kino, Tomohisa Kawashima

arxiv:1905.10717 v1 · 2019-05-26 · 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{36AZRQZ7EPDNGCWVHY7FIDBJUK}

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	2026-05-17T23:43:00.096501Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

df8198c33f23c6d30ad53e3e540c29a290355972a5f2e8f8118c649e18d28c03

Aliases

arxiv: 1905.10717 · arxiv_version: 1905.10717v1 · doi: 10.48550/arxiv.1905.10717 · pith_short_12: 36AZRQZ7EPDN · pith_short_16: 36AZRQZ7EPDNGCWV · pith_short_8: 36AZRQZ7

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/36AZRQZ7EPDNGCWVHY7FIDBJUK \
  | 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: df8198c33f23c6d30ad53e3e540c29a290355972a5f2e8f8118c649e18d28c03

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7bfd6e3260af48e9e1a033045724d95c9dfb2ed95d1186af8611654f47861b60",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-05-26T03:10:15Z",
    "title_canon_sha256": "eea23dfbe4365458e7faf4c78af83ea959b22660f8eda395a9651829dbf86336"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.10717",
    "kind": "arxiv",
    "version": 1
  }
}