Pith Number

pith:TWN6C73J

pith:2022:TWN6C73JVOVUQNSGPXB4XU7YEI

not attested not anchored not stored refs pending

Measuring the Ellipticity of M 87* Images

Andrew Chael, Avery E. Broderick, Daniel C. M. Palumbo, Paul Tiede

arxiv:2210.13499 v1 · 2022-10-24 · 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{TWN6C73JVOVUQNSGPXB4XU7YEI}

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	2026-07-05T05:25:08.680262Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d9be17f69abab4836467dc3cbd3f822351eb2480cf29e550ddf5a06b9506f17

Aliases

arxiv: 2210.13499 · arxiv_version: 2210.13499v1 · doi: 10.48550/arxiv.2210.13499 · pith_short_12: TWN6C73JVOVU · pith_short_16: TWN6C73JVOVUQNSG · pith_short_8: TWN6C73J

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/TWN6C73JVOVUQNSGPXB4XU7YEI \
  | 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: 9d9be17f69abab4836467dc3cbd3f822351eb2480cf29e550ddf5a06b9506f17

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1bc2cf71f47722cae844421660d137a94ad203d5cdc037f9ed4f87e937ff1e84",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2022-10-24T18:00:17Z",
    "title_canon_sha256": "324b0494ab02f60ecfad85433fe7e787c20f97a9d7275b5e80b566e216b87c6b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2210.13499",
    "kind": "arxiv",
    "version": 1
  }
}