Pith Number

pith:JTBKZKI7

pith:2011:JTBKZKI7WBXAZQ6WPN4EYC4ZD7

not attested not anchored not stored refs pending

Constraining the size of the dark region around the M87 black hole by space-VLBI observations

Rohta Takahashi, Shin Mineshige

arxiv:1102.3583 v1 · 2011-02-17 · 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{JTBKZKI7WBXAZQ6WPN4EYC4ZD7}

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	2026-05-18T02:03:09.966847Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4cc2aca91fb06e0cc3d67b784c0b991fc1be037d1d5ce9a0e152d0514eef4c90

Aliases

arxiv: 1102.3583 · arxiv_version: 1102.3583v1 · doi: 10.48550/arxiv.1102.3583 · pith_short_12: JTBKZKI7WBXA · pith_short_16: JTBKZKI7WBXAZQ6W · pith_short_8: JTBKZKI7

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/JTBKZKI7WBXAZQ6WPN4EYC4ZD7 \
  | 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: 4cc2aca91fb06e0cc3d67b784c0b991fc1be037d1d5ce9a0e152d0514eef4c90

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd0b47240d01b3914293bedeeb6443420fa73f2332b0b0a9507970433ab6ba96",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2011-02-17T13:43:19Z",
    "title_canon_sha256": "2688b585ea897acbb42d01e3803135e92bda29c75b13a3503454859842ec9d59"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.3583",
    "kind": "arxiv",
    "version": 1
  }
}