Pith Number

pith:NLZJUNPA

pith:2019:NLZJUNPATEBW7ROJ4B52ZO66JD

not attested not anchored not stored refs pending

A Parametric model for the shapes of black-hole shadows in non-Kerr spacetimes

Dimitrios Psaltis, Feryal \"Ozel, Lia Medeiros

arxiv:1907.12575 v2 · 2019-07-29 · astro-ph.HE · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NLZJUNPATEBW7ROJ4B52ZO66JD}

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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

Determining parameters of Kerr-Newman black holes by shadow observation from finite distance and spatial infinity

Receipt and verification

First computed	2026-07-05T01:10:26.852137Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6af29a35e099036fc5c9e07bacbbde48c18c6ea3b247f80b47443e3df2b202b0

Aliases

arxiv: 1907.12575 · arxiv_version: 1907.12575v2 · doi: 10.48550/arxiv.1907.12575 · pith_short_12: NLZJUNPATEBW · pith_short_16: NLZJUNPATEBW7ROJ · pith_short_8: NLZJUNPA

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/NLZJUNPATEBW7ROJ4B52ZO66JD \
  | 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: 6af29a35e099036fc5c9e07bacbbde48c18c6ea3b247f80b47443e3df2b202b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f4b15716b0e82557bcccf129fec8c51b685053bff75f2ce6a6fe92f8d2adf2f5",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-07-29T18:01:20Z",
    "title_canon_sha256": "7ff29146e4be61fe6f8c0f9b9f75a6df30fd07921f62097e3d22d696ba3ced02"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.12575",
    "kind": "arxiv",
    "version": 2
  }
}