Pith Number

pith:Z47Z3SEI

pith:2023:Z47Z3SEIXAL6NMSKKKVGUXI4PQ

not attested not anchored not stored refs pending

Prediction for the interferometric shape of the first black hole photon ring

Alejandro C\'ardenas-Avenda\~no, Alexandru Lupsasca

arxiv:2305.12956 v2 · 2023-05-22 · 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{Z47Z3SEIXAL6NMSKKKVGUXI4PQ}

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

The glow of eternal black holes

Receipt and verification

First computed	2026-07-05T06:53:25.010569Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf3f9dc888b817e6b24a52aa6a5d1c7c06b057eb1826b85493573d495cd6a749

Aliases

arxiv: 2305.12956 · arxiv_version: 2305.12956v2 · doi: 10.48550/arxiv.2305.12956 · pith_short_12: Z47Z3SEIXAL6 · pith_short_16: Z47Z3SEIXAL6NMSK · pith_short_8: Z47Z3SEI

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/Z47Z3SEIXAL6NMSKKKVGUXI4PQ \
  | 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: cf3f9dc888b817e6b24a52aa6a5d1c7c06b057eb1826b85493573d495cd6a749

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "97ea896febef08ff832fb380088c7b547c344134461bfabb9a6caf0b861153a5",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2023-05-22T12:04:58Z",
    "title_canon_sha256": "31ceb62848696ac5ff906ad5a175e796b5ce71cb9965a3a40f90202dec5e3b95"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2305.12956",
    "kind": "arxiv",
    "version": 2
  }
}