Pith Number

pith:KS5MRJFB

pith:2021:KS5MRJFBTJ6I62XX2557JR5CIE

not attested not anchored not stored refs pending

Can supermassive black hole shadows test the Kerr metric?

George Pappas, Kostas Glampedakis

arxiv:2102.13573 v3 · 2021-02-26 · gr-qc · 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{KS5MRJFBTJ6I62XX2557JR5CIE}

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.

Cited by

1 paper in Pith

Reshaping the inner shadow of a Kerr black hole by a torn accretion disk

Receipt and verification

First computed	2026-07-05T03:24:08.956798Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54bac8a4a19a7c8f6af7d77bf4c7a24106aad548eafb43431d13f1db23ac80ee

Aliases

arxiv: 2102.13573 · arxiv_version: 2102.13573v3 · doi: 10.48550/arxiv.2102.13573 · pith_short_12: KS5MRJFBTJ6I · pith_short_16: KS5MRJFBTJ6I62XX · pith_short_8: KS5MRJFB

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/KS5MRJFBTJ6I62XX2557JR5CIE \
  | 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: 54bac8a4a19a7c8f6af7d77bf4c7a24106aad548eafb43431d13f1db23ac80ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7f1b9b8db4a7752eb34ef743d332768b331fbb68ff1c59643458ae355cea3ac5",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2021-02-26T16:31:32Z",
    "title_canon_sha256": "6e340b1e57c923a3171dda0344a11096c4b615d1c0300cbe9fb94219174138bc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.13573",
    "kind": "arxiv",
    "version": 3
  }
}