Pith Number

pith:LCGUJPBV

pith:2021:LCGUJPBV6Q57MSOT6DQOZZ7SUK

not attested not anchored not stored refs pending

Constraints on a tidal charge of the supermassive black hole in M87* with the EHT observations in April 2017

Alexander F. Zakharov

arxiv:2108.01533 v2 · 2021-08-03 · gr-qc · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LCGUJPBV6Q57MSOT6DQOZZ7SUK}

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

Charged black holes in Kalb-Ramond gravity: Weak Deflection Angle, Shadow cast, Quasinormal Modes and Neutrino annihilation

Receipt and verification

First computed	2026-07-05T04:02:17.955090Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

588d44bc35f43bf649d3f0e0ece7f2a28c036783d76f14a2f0b9a6cf2ade90a4

Aliases

arxiv: 2108.01533 · arxiv_version: 2108.01533v2 · doi: 10.48550/arxiv.2108.01533 · pith_short_12: LCGUJPBV6Q57 · pith_short_16: LCGUJPBV6Q57MSOT · pith_short_8: LCGUJPBV

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/LCGUJPBV6Q57MSOT6DQOZZ7SUK \
  | 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: 588d44bc35f43bf649d3f0e0ece7f2a28c036783d76f14a2f0b9a6cf2ade90a4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "daae415cd6ededaeb64cdd31ddc83fdc8e3bd2725647188f313a5819fae11fb4",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2021-08-03T14:32:55Z",
    "title_canon_sha256": "04c80b8486674dfb2e932301a4b08359959792e7fea6e240b12be2e3ce89449f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.01533",
    "kind": "arxiv",
    "version": 2
  }
}