Pith Number

pith:DONY6UCJ

pith:2023:DONY6UCJABZ2YI2QWORJ3EPP4W

not attested not anchored not stored refs pending

Constraints on black hole charges in M87* and Sgr A* with the EHT observations

Alexander F. Zakharov

arxiv:2305.15446 v1 · 2023-05-24 · gr-qc · physics.hist-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DONY6UCJABZ2YI2QWORJ3EPP4W}

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

Observational Limits on Einasto Dark Matter Parameters from Event Horizon Telescope Images of Sgr A$^{*}$ and M87$^{*}$

Receipt and verification

First computed	2026-07-05T06:13:40.703074Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b9b8f50490073ac2350b3a29d91efe59f585aa05013279b38bb7a494508be16

Aliases

arxiv: 2305.15446 · arxiv_version: 2305.15446v1 · doi: 10.48550/arxiv.2305.15446 · pith_short_12: DONY6UCJABZ2 · pith_short_16: DONY6UCJABZ2YI2Q · pith_short_8: DONY6UCJ

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/DONY6UCJABZ2YI2QWORJ3EPP4W \
  | 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: 1b9b8f50490073ac2350b3a29d91efe59f585aa05013279b38bb7a494508be16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "179bc45616ae6bf75312d5ff636b547501fab2224be9f1d1aab93b4b803048ca",
    "cross_cats_sorted": [
      "physics.hist-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2023-05-24T09:42:38Z",
    "title_canon_sha256": "75cac0bf5fd9c320ffd81cdbb36fbde02ecd4717d010091e6d6733224b9fdac6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2305.15446",
    "kind": "arxiv",
    "version": 1
  }
}