Pith Number

pith:6Q37IPKX

pith:2022:6Q37IPKXRFFO57SEWR43Z7SZ7W

not attested not anchored not stored refs pending

The Photon Ring in M87*

Alejandra Jimenez-Rosales, Alejandro Cruz-Osorio, Angelo Ricarte, Antonios Nathanail, Avery E. Broderick, Bart Ripperda, Boris Georgiev, Britton Jeter, Carsten Kramer, Chiara Ceccobello, Christian M. Fromm, Chunchong Ni, David J. James, Dominic W. Pesce, Feng Yuan, Fumie Tazaki, Geoffrey B. Crew, Hung-Yi Pu, Ivan Mart\'i-Vidal, James M. Moran, Joey Neilsen, Jonathan Weintroub, Jongho Park, Joseph Farah, Jun Yi Koay, Karl M. Menten, Kenji Toma, Koushik Chatterjee, Lijing Shao, Luciano Rezzolla, Luis C. Ho, Maciek Wielgus, Michael Lindqvist, Monika Moscibrodzka, Nicholas S. Conroy, Pablo Torne, Paul Tiede, Peter Galison, Razieh Emami, Richard Anantua, Roman Gold, Sang-Sung Lee, Shan-Shan Zhao, Sheperd S. Doeleman, Shuo Zhang, Silke Britzen, Thomas P. Krichbaum, Vincent Pietu, Yongjun Chen, Yosuke Mizuno, Yuzhu Cui

arxiv:2208.09004 v1 · 2022-08-18 · 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{6Q37IPKXRFFO57SEWR43Z7SZ7W}

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	2026-07-05T04:49:55.235706Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f437f43d57894aeefe44b479bcfe59fdb0b1e565af2f39c7330a7d988f282412

Aliases

arxiv: 2208.09004 · arxiv_version: 2208.09004v1 · doi: 10.48550/arxiv.2208.09004 · pith_short_12: 6Q37IPKXRFFO · pith_short_16: 6Q37IPKXRFFO57SE · pith_short_8: 6Q37IPKX

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/6Q37IPKXRFFO57SEWR43Z7SZ7W \
  | 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: f437f43d57894aeefe44b479bcfe59fdb0b1e565af2f39c7330a7d988f282412

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "60ca2c339a3faa3071360646bfca7d5e1e4db819bdfaf80c5d6dc1980f07c54b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2022-08-18T18:00:07Z",
    "title_canon_sha256": "e5f181b519ff7ddbf4762f7a17d1a8875af2d3c085f982fc016e5c18b74d9c71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2208.09004",
    "kind": "arxiv",
    "version": 1
  }
}